File "redox-ahl-hl-only-paper-1-questions.html"
Path: /StudyIB/chemistry/page/2731/redox-ahl-hl-only-paper-1-questionshtml
File size: 54.07 KB
MIME-type: text/html
Charset: utf-8
<!DOCTYPE html><html lang="EN"><head> <script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start': new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0], j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src= 'https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f); })(window,document,'script','dataLayer','GTM-PZBWZ8J');</script> <title>Redox AHL (HL only) paper 1 questions</title><!-- Removed by WebCopy --><!--<base href="/">--><!-- Removed by WebCopy --><meta http-equiv="x-ua-compatible" content="IE=Edge"><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1"><link href="../../../css/bootstrap.flatly.min.css" rel="stylesheet" media="screen"><link rel="stylesheet" href="../../../fonts/awesome/css/font-awesome.min.css"><link href="../../../js/jquery-fancybox/jquery.fancybox.min.css" type="text/css" rel="stylesheet"><link rel="stylesheet" href="../../../css/style.min.css?v=202301301645"><meta name="robots" content="index, follow"><meta name="googlebot" content="noarchive"><meta prefix="og: http://ogp.me/ns#" property="og:title" name="og:title" content="StudyIB Chemistry: Redox AHL (HL only) paper 1 questions"> <meta prefix="og: http://ogp.me/ns#" property="og:image" content="https://studyib.net/img/studyib-card-default.jpg"> <meta prefix="og: http://ogp.me/ns#" property="og:description" name="og:description" content=" Topic 19"> <meta prefix="og: http://ogp.me/ns#" property="og:url" name="og:url" content="https://studyib.net/chemistry/page/2731/redox-ahl-hl-only-paper-1-questions"> <meta prefix="og: http://ogp.me/ns#" property="og:site_name" name="og:site_name" content="StudyIB - Your IB learning companion"> <meta prefix="og: http://ogp.me/ns#" property="og:locale" name="og:locale" content="en"> <meta prefix="og: http://ogp.me/ns#" property="og:type" name="og:type" content="website"> <meta name="description" content=" Topic 19"> <meta name="image" content="https://studyib.net/img/studyib-card-default.jpg"> <meta name="keywords" content="IB, IBDP, InThinking, International Baccalaureate, Revision, Revision websites, Student Sites, Students, Learning, Guidance, Exam, Questions, Practice problems, Diagnose, Help, Notes"> <meta itemprop="name" content="StudyIB Chemistry: Redox AHL (HL only) paper 1 questions"> <meta itemprop="description" content=" Topic 19"> <meta itemprop="image" content="https://studyib.net/img/studyib-card-default.jpg"> <meta name="twitter:card" content="summary_large_image"> <meta name="twitter:title" content="StudyIB Chemistry: Redox AHL (HL only) paper 1 questions"> <meta name="twitter:description" content=" Topic 19"> <meta name="twitter:image" content="https://studyib.net/img/studyib-card-default.jpg"> <meta name="twitter:creator" content="@inthinker"><link rel="stylesheet" href="../../../css/snippets.min.css?v=202209111300"><link rel="stylesheet" href="../../../css/article.min.css?v=202211221000"><style type="text/css">.filter-sl-only { display: none; }</style><script src="../../../ajax/libs/mathjax/2.7.0/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script><script src="../../../js/ifvisible.min.js"></script><script>ifvisible.setIdleDuration(300);</script><link rel="apple-touch-icon-precomposed" sizes="57x57" href="../../../img/favicon/apple-touch-icon-57x57.png"> <link rel="apple-touch-icon-precomposed" sizes="114x114" href="../../../img/favicon/apple-touch-icon-114x114.png"> <link rel="apple-touch-icon-precomposed" sizes="72x72" href="../../../img/favicon/apple-touch-icon-72x72.png"> <link rel="apple-touch-icon-precomposed" sizes="144x144" href="../../../img/favicon/apple-touch-icon-144x144.png"> <link rel="apple-touch-icon-precomposed" sizes="60x60" href="../../../img/favicon/apple-touch-icon-60x60.png"> <link rel="apple-touch-icon-precomposed" sizes="120x120" href="../../../img/favicon/apple-touch-icon-120x120.png"> <link rel="apple-touch-icon-precomposed" sizes="76x76" href="../../../img/favicon/apple-touch-icon-76x76.png"> <link rel="apple-touch-icon-precomposed" sizes="152x152" href="../../../img/favicon/apple-touch-icon-152x152.png"> <link rel="icon" type="image/png" href="../../../img/favicon/favicon-196x196.png" sizes="196x196"> <link rel="icon" type="image/png" href="../../../img/favicon/favicon-96x96.png" sizes="96x96"> <link rel="icon" type="image/png" href="../../../img/favicon/favicon-32x32.png" sizes="32x32"> <link rel="icon" type="image/png" href="../../../img/favicon/favicon-16x16.png" sizes="16x16"> <link rel="icon" type="image/png" href="../../../img/favicon/favicon-128.png" sizes="128x128"> <meta name="application-name" content="StudyIB: Your IB Learning Companion"> <meta name="msapplication-TileColor" content="#A5BED5"> <meta name="msapplication-TileImage" content="/img/favicon/mstile-144x144.png"> <meta name="msapplication-square70x70logo" content="/img/favicon/mstile-70x70.png"> <meta name="msapplication-square150x150logo" content="/img/favicon/mstile-150x150.png"> <meta name="msapplication-wide310x150logo" content="/img/favicon/mstile-310x150.png"> <meta name="msapplication-square310x310logo" content="/img/favicon/mstile-310x310.png"><script>var stdHash = "6da675cbcb3d25f050b05557349abc79", stdTicket = "082b9c9c4ae3624d";</script><script src="../../../js/user/local-stats.min.js?v=202205311700"></script><link href="../../../css/subjects-frontpage.min.css?v=202302031000" rel="stylesheet"></head><body class="public chemistry"> <noscript><iframe src="https://www.googletagmanager.com/ns.html?id=GTM-PZBWZ8J" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript> <div id="top-header"> <div class="wmap general hidden-sm hidden-xs subjects"> <div class="layout-wrapper"> <div class="container-fluid"> <a href=""> <img class="header-thinker" src="../../../img/header-thinker.svg"> </a> <h1> <a href="../../../chemistry.html"> IBDP Chemistry </a> <a href="https://inthinking.net" title="inthinking.net" class="inthinking-logo pull-right"> <img src="../../../img/header-logo.svg" style="height: 80px; width: auto;"> </a> </h1> <p class="slogan">InThinking Revision Sites for students</p> <p class="author">Website by <strong>Paul Lloyd</strong></p> <p class="updated">Updated 1 February 2023</p> </div> </div> </div> <nav id="public-topnav" class="navbar navbar-default"> <div class="container-fluid"> <div class="navbar-header"> <a class="navbar-brand hidden-md hidden-lg" href="../../../index.htm"> <img class="header-xs-thinker" src="../../../img/header-thinker.svg"> </a> <button type="button" class="collapsed navbar-toggle" data-toggle="collapse" data-target="#subject-navbar-collapse" aria-expanded="false"> <span class="sr-only">Toggle navigation</span> <i class="fa fa-fw fa-2x fa-user"></i> </button> <div class="brand hidden-lg hidden-md hidden-sm"> <a class="brand-xs" href="../../../chemistry.html"> <strong class="title" style="white-space: nowrap;font-size: 18px;">Chemistry</strong> </a> </div> </div> <div class="collapse navbar-collapse" id="subject-navbar-collapse"> <ul class="nav navbar-bar navbar-userbox hidden-md hidden-lg"><li class="dropdown"><a href="#" class="dropdown-toggle" data-toggle="dropdown"><i class="fa fa-fw fa-lg fa-user-circle" style="margin-right: 5px;"></i><span style="font-size: 16px;"></span></a><ul class="dropdown-menu"><li class="dropdown-submenu"><a class="dropdown-toggle" href="#" data-toggle="dropdown"><i class="fa fa-fw fa-globe"></i> Subjects</a><ul class="dropdown-menu"><li></li><li class=""><a href="../../../biology.html">DP Biology</a></li><li class="active"><a href="../../../chemistry.html"><i class="fa fa-caret-right"></i> DP Chemistry</a></li><li class=""><a href="../../../englishalanglit.html">DP English A: Language & Literature</a></li><li class=""><a href="../../../mathsanalysis.html">DP Maths: Analysis & Approaches</a></li><li class=""><a href="../../../mathsapplications.html">DP Maths: Applications & Interpretations SL</a></li><li class=""><a href="../../../physics.html">DP Physics</a></li><li class=""><a href="../../../spanishb.html">DP Spanish B</a></li></ul></li><li class="menu-item"><a href="../../../user.html"><i class="fa fa-fw fa-dashboard"></i> Dashboard</a></li><li class="menu-item"><a href="../../../user/profile.html"><i class="fa fa-fw fa-cog"></i> My profile</a></li><li class="menu-item"><a href="../../../user/messages.html"><i class="fa fa-fw fa-envelope"></i> Messages</a></li><li class="menu-item hidden-md hidden-lg mt-xs-3"><a href="../../../index.htm?logout=1" class="btn btn-primary btn-xs-block"><i class="fa fa-fw fa-lg fa-power-off text-danger"></i>Log out</a></li></ul></li></ul> <ul class="nav navbar-bar"><li class=""><a class="home" href="../../../chemistry.html"><i class="fa fa-fw fa-home"></i> Home</a></li><li class=""><a class="topics" href="#"><i class="fa fa-fw fa-th-large"></i> Topics</a></li><li class=""><a class="favorites" href="../../../chemistry.html"><i class="fa fa-fw fa-star"></i> My favorites</a></li><li class=""><a class="" href="../../flashcards.html"><i class="fa fa-fw fa-bolt"></i> Flashcards</a></li><li class=""><a class="qbank" href="../../test-your-knowledge.html"><i class="fa fa-fw fa-question"></i> Question bank</a></li><li class=""><a class="networks" href="../../networks.html"><i class="fa fa-fw fa-graduation-cap"></i> Virtual tutor</a></li><li class=""><a class="" href="../../blogs.html"><i class="fa fa-fw fa-paperclip"></i> Blog</a></li><li class=""><a class="sitemap" href="../../sitemap.html"><i class="fa fa-fw fa-sitemap"></i> Sitemap</a></li><li class=""><a class="activity" href="../../../chemistry.html"><i class="fa fa-fw fa-calendar-check-o"></i> My activity</a></li></ul> <ul class="nav navbar-bar navbar-right"> <li> <form class="navbar-form hidden-md hidden-lg" role="search" method="get" action="chemistry/search"> <div class="input-group"> <input class="form-control nav-search" name="glob" type="search" placeholder="Search..."> <span class="input-group-btn"> <button type="submit" class="btn bg-blue"> <i class="fa fa-search"> </i> </button> </span> </div> </form> <a href="#" class="toggle-menu-search hidden-sm hidden-xs" data-toggle="dropdown"> <i class="fa fa-lg fa-search"></i> </a> </li></ul> </div> </div></nav><nav id="nav-menu-search" class="shadow-bottom hidden-sm hidden-xs" style="display: none;"> <div class="container-fluid"> <form class="" role="search" method="get" action="chemistry/search"> <input class="form-control nav-search" name="glob" type="search" placeholder="Search Chemistry..."> <button class="btn btn-sm btn-primary" type="submit"> Search </button> </form> </div></nav><div class="modal fade" tabindex="-1" role="dialog" id="modal-mini-login"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-body"> <button aria-hidden="true" data-dismiss="modal" class="close hidden-xs login-button-close" type="button">×</button> <form method="post"> <div class="form-group"> <input name="user-email" class="form-control" type="text" placeholder="Email"> </div> <div class="form-group"> <input name="user-password" class="form-control" type="password" placeholder="Password"> <input name="user-fp" class="fp" value="d8c893da5db7501669ffeeac46273ba6" type="hidden"> </div> <div class="form-group"> <a href="../../../reset-password.html" class="reset-password" style="font-weight: normal;"> Forgot your password? </a> </div> <div class="form-group"> <button type="submit" name="submit-login" value="1" class="btn btn-primary btn-block text-center"> <i class="fa fa-user fa-fw"></i> Log in </button> </div> </form> </div> </div> </div></div></div><div class="modal fade" id="show-topics" tabindex="-1" role="dialog"><div id="dialog-topics" class="modal-dialog modal-dialog-topics"><div class="modal-content"><div class="modal-body modal-body-topics"><div id="new-frontpage-toplevels-topics" class="frontpage-box"><div class="row"><div class="col-md-4 col-sm-4"><div class="item"><a href="../3004/free-access-weekend.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Free Access Weekend!</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/general-images/free.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../2075/paper-1-exam-questions.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Paper 1 Exam Questions</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/test-images/exams.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../2124/paper-2-exam-questions.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Paper 2 Exam Questions</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/general-images/paper-2.2.png'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../1138/start-here.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Start Here</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/general-images/start-here.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../343/stoichiometry.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Stoichiometry</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/stoichiometry/scales-1333455_640.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../355/atomic-structure.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Atomic Structure</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/atomic-structure/the-atom.png'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../356/periodicity.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Periodicity</h3></div><div class="body"><div class="cropper" style="background-image: url('/media/chemistry/images/periodicity/p-block.png'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../357/bonding-and-structure.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Bonding & Structure</h3></div><div class="body"><div class="cropper" style="background-image: url('/media/chemistry/images/chemical-bonding-and-structure/crystallize-482971_640.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../358/energetics.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Energetics</h3></div><div class="body"><div class="cropper" style="background-image: url('/media/chemistry/images/energetics-thermochemistry/fire-1030751_640.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../359/kinetics.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Kinetics</h3></div><div class="body"><div class="cropper" style="background-image: url('/media/chemistry/images/chemical-kinetics/time-731110_640.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../360/equilibrium.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Equilibrium</h3></div><div class="body"><div class="cropper" style="background-image: url('/media/chemistry/images/equilibrium/soda-466542_640.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../361/acids-and-bases.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Acids & Bases</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/acids-and-bases/ui-paper-2.png'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../362/redox-processes.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Redox Processes</h3></div><div class="body"><div class="cropper" style="background-image: url('/media/chemistry/images/redox-processes/oxide-1241222_640.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../342/organic-chemistry.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Organic Chemistry</h3></div><div class="body"><div class="cropper" style="background-image: url('../../images/organic-chemistry/d-idose_molekulbaukasten_9173.jpg'); height: 10vw;"></div></div></a></div></div><div class="col-md-4 col-sm-4"><div class="item"><a href="../363/measurement.html"><div class="header" style="height: 35px;"><h3 class="title special" style="margin-top: 0;">Measurement</h3></div><div class="body"><div class="cropper" style="background-image: url('/media/chemistry/images/measurement-and-data/tablet-600649_640.jpg'); height: 10vw;"></div></div></a></div></div></div></div></div></div></div></div><div class="container-fluid shadow-ith"><div class="row frontpage"> <div class="col-md-3" id="left-column"> <p class="visible-xs-block"></p><div class="dropdown user-menu hidden-xs" style="margin-bottom: 20px;"> <button type="button" class="btn btn-default dropdown-toggle" data-toggle="dropdown" style="border-radius: 0; padding: 6px 18px;"> <i class="fa fa-fw fa-user-circle"></i> <small><i class="fa fa-caret-down"></i></small> </button> <ul class="dropdown-menu"> <li class="dropdown-submenu"><a href="#"><i class="fa fa-fw fa-globe"></i> Subjects</a><ul id="user-subjects-menu" class="dropdown-menu"><li></li><li class=""><a href="../../../biology.html">DP Biology</a></li><li class="active"><a href="../../../chemistry.html"><i class="fa fa-caret-right"></i> DP Chemistry</a></li><li class=""><a href="../../../englishalanglit.html">DP English A: Language & Literature</a></li><li class=""><a href="../../../mathsanalysis.html">DP Maths: Analysis & Approaches</a></li><li class=""><a href="../../../mathsapplications.html">DP Maths: Applications & Interpretations SL</a></li><li class=""><a href="../../../physics.html">DP Physics</a></li><li class=""><a href="../../../spanishb.html">DP Spanish B</a></li></ul></li><li class="divider"></li><li><a href="../../../user.html"><i class="fa fa-fw fa-dashboard"></i> Dashboard</a></li><li><a href="../../../user/profile.html"><i class="fa fa-fw fa-cog"></i> My profile</a></li><li><a href="../../../user/messages.html"><i class="fa fa-fw fa-envelope"></i> Messages</a></li> <li class="divider"></li> <li> <a href="../../../index.htm?logout=1"> <i class="fa fa-fw fa-power-off"></i> Log out </a> </li> </ul></div> <div id="side-nav"><h4 class="side-nav-title dropdown"><a href="../2075/paper-1-exam-questions.html" class="dropdown-toggle toplevel-dropdown" data-toggle="dropdown"><i class="fa fa-ellipsis-v"></i></a> <a href="../2075/paper-1-exam-questions.html">Paper 1 Exam Questions</a><ul class="dropdown-menu"><li><a href="../../../chemistry.html" style="padding-left: 5px; border-bottom: solid 1px #ddd"><i class="fa fa-fw fa-home"></i> Home</a></li><li><a href="../3004/free-access-weekend.html"><i class="fa fa-fw fa-caret-right"></i> Free Access Weekend!</a></li><li><a href="../2124/paper-2-exam-questions.html"><i class="fa fa-fw fa-caret-right"></i> Paper 2 Exam Questions</a></li><li><a href="../1138/start-here.html"><i class="fa fa-fw fa-caret-right"></i> Start Here</a></li><li><a href="../343/stoichiometry.html"><i class="fa fa-fw fa-caret-right"></i> Stoichiometry</a></li><li><a href="../355/atomic-structure.html"><i class="fa fa-fw fa-caret-right"></i> Atomic Structure</a></li><li><a href="../356/periodicity.html"><i class="fa fa-fw fa-caret-right"></i> Periodicity</a></li><li><a href="../357/bonding-and-structure.html"><i class="fa fa-fw fa-caret-right"></i> Bonding and Structure</a></li><li><a href="../358/energetics.html"><i class="fa fa-fw fa-caret-right"></i> Energetics</a></li><li><a href="../359/kinetics.html"><i class="fa fa-fw fa-caret-right"></i> Kinetics</a></li><li><a href="../360/equilibrium.html"><i class="fa fa-fw fa-caret-right"></i> Equilibrium</a></li><li><a href="../361/acids-and-bases.html"><i class="fa fa-fw fa-caret-right"></i> Acids and Bases</a></li><li><a href="../362/redox-processes.html"><i class="fa fa-fw fa-caret-right"></i> Redox Processes</a></li><li><a href="../342/organic-chemistry.html"><i class="fa fa-fw fa-caret-right"></i> Organic Chemistry</a></li><li><a href="../363/measurement.html"><i class="fa fa-fw fa-caret-right"></i> Measurement</a></li></ul><div class="pull-right"><a class="sidenav-expand" title="Expand all" href="#"><i class="fa fa-plus-circle"></i></a> <a class="sidenav-compress" title="Compress all" href="#"><i class="fa fa-minus-circle"></i></a></div></h4><ul class="side-nav level-0"><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2123/stoichiometry-core-sl-hl-paper-1-questions.html">Stoichiometry core (SL & HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2118/atomic-structure-core-sl-and-hl-paper-1-questions.html"> Atomic Structure core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2125/atomic-structure-ahl-hl-only-paper-1-questions.html"> Atomic Structure AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2425/periodicity-core-sl-and-hl-paper-1-questions.html">Periodicity core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2736/periodicity-ahl-hl-only-paper-1-questions.html">Periodicity AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2161/bonding-and-structure-core-sl-and-hl-paper-1-questions.html">Bonding and Structure core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2703/bonding-and-structure-ahl-hl-only-paper-1-questions.html"> Bonding and Structure AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2708/energetics-core-sl-and-hl-paper-1-questions.html">Energetics core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2709/energetics-ahl-hl-only-paper-1-questions.html">Energetics AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2712/kinetics-core-sl-and-hl-paper-1-questions.html">Kinetics core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2721/kinetics-ahl-hl-only-paper-1-questions.html">Kinetics AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2155/equilibrium-core-sl-and-hl-paper-1-questions.html">Equilibrium core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2750/equilibrium-ahl-hl-only-paper-1-questions.html">Equilibrium AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2758/acids-and-bases-core-sl-and-hl-paper-1-questions.html">Acids and Bases core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2761/acids-and-bases-ahl-hl-only-paper-1-questions.html">Acids and Bases AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2724/redox-core-sl-and-hl-paper-1-questions.html">Redox core (SL and HL) paper 1 questions</a></label></li><li class="expanded parent selected"><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="redox-ahl-hl-only-paper-1-questions.html">Redox AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2149/organic-chemistry-core-sl-and-hl-paper-1-questions.html">Organic chemistry core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2768/organic-chemistry-ahl-hl-only-paper-1-questions.html">Organic chemistry AHL (HL only) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2775/measurement-core-sl-and-hl-paper-1-questions.html">Measurement core (SL and HL) paper 1 questions</a></label></li><li class=""><label style="padding-left: 0px"><i class="fa fa-fw"></i><a href="../2776/measurement-ahl-hl-only-paper-1-questions.html">Measurement AHL (HL only) paper 1 questions</a></label></li></ul></div> <button id="show-periodic-table" class="btn btn-default btn-block" style="margin-bottom: 10px"><i class="fa fa-table"></i> Periodic table</button> <div class="hidden-xs hidden-sm"> <button class="btn btn-default btn-block text-xs-center" data-toggle="modal" data-target="#modal-feedback" style="margin-bottom: 10px"><i class="fa fa-send"></i> Feedback</button> </div> </div> <div class="col-md-9" id="main-column"> <h1 class="page_title"> Redox AHL (HL only) paper 1 questions <a href="#" class="mark-page-favorite pull-right" data-pid="2731" title="Mark as favorite" onclick="return false;"><i class="fa fa-star-o"></i></a> </h1> <ol class="breadcrumb"> <li><a href="../../../chemistry.html"><i class="fa fa-home"></i></a><i class="fa fa-fw fa-chevron-right divider"></i></li><li><a href="../2075/paper-1-exam-questions.html">Paper 1 Exam Questions</a><i class="fa fa-fw fa-chevron-right divider"></i></li><li><span class="gray">Redox AHL (HL only) paper 1 questions</span></li> <span class="pull-right" style="color: #555" title="Suggested study time: 30 minutes"><i class="fa fa-clock-o"></i> 30'</span> </ol> <article id="main-article"> <p><strong>Topic 19.1</strong></p> <p><strong>Paper 1 style questions </strong>are multiple choice. You are <strong>not permitted to use a calculator or the data book</strong> for these questions, but you should use a periodic table.</p> <p>A <strong>periodic table pop-up</strong> is available on the left hand menu.</p> <div class="greenBg"> <div class="tib-quiz" data-stats="7-821-2731"><div class="label label-default q-number">1</div><div class="exercise shadow-bottom"><div class="q-question"><p>Which of the following species are components of the standard hydrogen electrode?</p><p><strong>1: </strong>Pt (s)</p><p><strong>2: </strong>H<sup>+</sup> (aq)</p><p><strong>3: </strong>OH<sup>−</sup> (aq)</p></div><div class="q-answer"><p><label class="radio"><input class="c" type="radio"> 1 and 2 only</label></p><p><label class="radio"><input type="radio"> 1, 2 and 3</label></p><p><label class="radio"><input type="radio"> 1 and 3 only</label></p><p><label class="radio"><input type="radio"> 2 only</label></p></div><div class="q-explanation"><p>Electrode potentials are measured against the standard hydrogen electrode.</p><p>The standard hydrogen electrode consists of a feed of <strong>hydrogen gas </strong>at 100 kPa onto an <strong>inert Pt electrode</strong> in 1 mol dm<sup>–3</sup> <strong>hydrochloric acid</strong> all at 298 K.</p><p>The platinum electrode is coated with platinum black; finely powdered platinum to give a high surface area for the reaction to occur on:</p><p>H<sup>+</sup><sub>(aq)</sub> + e<sup>–</sup> ⇌ ½H<sub>2(g)</sub> E<sup><s>o</s></sup> = 0.00 V</p><p>Thus <strong>1 and 2 only </strong>is the correct answer.</p><p><img alt="" src="../../images/redox-processes/she.png" style="width: 160px; height: 270px;"></p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">2</div><div class="exercise shadow-bottom"><div class="q-question"><p>What are the products at the cathode (negative electrode) and anode (positive electrode) when concentrated KCl(aq) is electrolysed using inert electrodes?</p></div><div class="q-answer"><p><label class="radio"> <input type="radio"> <span>Cathode: K Anode: O<sub>2</sub></span></label></p><p><label class="radio"> <input type="radio"> <span>Cathode: K Anode: Cl<sub>2</sub></span></label></p><p><label class="radio"> <input type="radio"> <span>Cathode: H<sub>2</sub> Anode: O<sub>2</sub></span></label></p><p><label class="radio"> <input class="c" type="radio"> Cathode: H<sub>2</sub> Anode: Cl<sub>2</sub></label></p></div><div class="q-explanation"><p>The species discharged at the cathode/negative electrode (gaining e<sup>–</sup>) will be lower (less –ve) in the electrochemical series; water is lower than potassium so water is discharged, forming hydrogen gas (hydrogen is lower in the activity series than potassium). Without the data booklet we must remember that the <strong>least reactive</strong> metal/hydrogen is discharged.</p><p>The species discharged at the anode/positive electrode (losing e<sup>–</sup>) will be higher (less +ve) in the electrochemical series. Again, without the data booklet we must remember that the <strong>least reactive</strong> non-metal is discharged. <strong>Note! Exception: </strong>Chloride ions (½Cl<sub>2(g)</sub> + e<sup>–</sup> ⇌ Cl<sup>–</sup><sub>(aq) </sub>E<sup><s>o</s></sup> = +1.36 V) are preferentially discharged over water (½O<sub>2(g)</sub> + 2H<sup>+</sup><sub>(aq)</sub> + 2e<sup>–</sup> ⇌ H<sub>2</sub>O<sub>(l)</sub> E<sup><s>o</s></sup> = +1.23 V) at the positive electrode despite their E<sup><s>o</s></sup> values (this is a kinetic effect that needs remembering).</p><p>Thus <strong>Cathode: H<sub>2 </sub>Anode: Cl<sub>2</sub></strong> is the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">3</div><div class="exercise shadow-bottom"><div class="q-question"><p>Which factors affect the amount of product formed at the anode during the electrolysis of a molten metal halide?</p><p><strong>1: </strong>Current</p><p><strong>2: </strong>The charge on the metal ion</p><p><strong>3: </strong>Time</p></div><div class="q-answer"><p><label class="radio"><input class="c" type="radio"> 1 and 3 only</label></p><p><label class="radio"><input type="radio"> 1, 2 and 3</label></p><p><label class="radio"><input type="radio"> 1 and 2 only</label></p><p><label class="radio"><input type="radio"> 2 only</label></p></div><div class="q-explanation"><p>During electrolysis of a molten metal halide, the metal ions will be discharged at the cathode (negative electrode) and the halide ions will be discharged at the anode (positive electrode).</p><p>The amount of charge passed can be found thus: charge (coulombs, C) = <strong>current</strong> (amps, A) × <strong>time </strong>(seconds, s), so both current and time will affect the amount of electrons and therefore the amount of product formed at the anode and cathode.</p><p>However, the metal ion is discharged at the cathode, rather than the anode, so the charge on the metal ion will have no impact on the amount of product at the anode.</p><p>Thus <strong>1 and 3 only </strong>is the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">4</div><div class="exercise shadow-bottom"><div class="q-question"><p>What is the cell potential for a voltaic cell consisting of the half-cells below?</p><p>Mn<sup>2+</sup><sub>(aq)</sub> + 2e<sup>–</sup> ⇌ Mn<sub>(s) </sub> E<sup><s>o</s></sup> = –1.18 V</p><p>Cu<sup>2+</sup><sub>(aq)</sub> + 2e<sup>–</sup> ⇌ Cu<sub>(s) </sub> E<sup><s>o</s></sup> = +0.34 V</p></div><div class="q-answer"><p><label class="radio"> <input class="c" type="radio"> <span>+1.52 V</span></label> </p><p><label class="radio"> <input type="radio"> <span>+0.84 V</span></label> </p><p><label class="radio"> <input type="radio"> <span>−0.84 V</span></label> </p><p><label class="radio"> <input type="radio"> <span>+0.00 V</span></label> </p></div><div class="q-explanation"><p>In a voltaic cell the half-cell highest in the electrochemical series (most negative) loses electrons (oxidation) and the half-cell lowest in the electrochemical series (most positive) gains electrons (reduction).</p><p>The cell potential is the difference (as on a number line) in the potential of the two half-cells.</p><p>Or mathematically E<sup><s>o</s></sup>cell = E<sup><s>o</s></sup>cathode – E<sup><s>o</s></sup>anode = +0.34 – –1.18 = +1.52 V</p><p>Thus <strong>+1.52 V</strong> is the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">5</div><div class="exercise shadow-bottom"><div class="q-question"><p>Which combination would electroplate an object with nickel?</p><p><img alt="" src="../../images/redox-processes/generic-cell.png" style="width: 240px; height: 235px;"></p></div><div class="q-answer"><p><label class="radio"> <input type="radio"> <span>Electrode X: Object Electrode Y: Nickel Electrolyte Z: HCl(aq)</span></label></p><p><label class="radio"> <input type="radio"> <span>Electrode X: Nickel Electrode Y: Object Electrolyte Z: HCl(aq)</span></label></p><p><label class="radio"> <input type="radio"> <span>Electrode X: Object Electrode Y: Nickel Electrolyte Z: NiSO<sub>4</sub>(aq)</span></label></p><p><label class="radio"> <input class="c" type="radio"> Electrode X: Nickel Electrode Y: Object Electrolyte Z: NiSO<sub>4</sub>(aq)</label></p></div><div class="q-explanation"><p>If electrodes are inert (e.g. platinum) then they do not get involved in the electrolysis process. Electrodes that are made of other metals may be preferentially involved in the electrolysis, depending on position in the electrochemical series.</p><p>If nickel electrodes (instead of inert electrodes) are used to electrolyse nickel sulfate (NiSO<sub>4</sub>(aq)) solution then nickel will be lost from the anode (positive electrode) and gained at the cathode (negative electrode).</p><p>Therefore the object needs to be placed as the cathode (Y) as nickel is deposited on the cathode, and the anode (X) needs to be nickel, as nickel is lost from the anode (instead of oxygen being produced). The solution needs to be a nickel salt solution, in this case NiSO<sub>4</sub>(aq).</p><p>Thus <strong>Electrode X: Nickel Electrode Y: Object Electrolyte Z: NiSO<sub>4</sub>(aq)</strong> is the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">6</div><div class="exercise shadow-bottom"><div class="q-question"><p>Two molten electrolyte cells are electrolysed in series. What mass of magnesium (A<sub>r</sub> = 24) is deposited at the cathode in ‘cell A’, if <span class="math-tex">\(x\)</span> g of gallium (A<sub>r</sub> = 70) is deposited at the cathode in ‘cell B’?</p></div><div class="q-answer"><p><label class="radio"> <input class="c" type="radio"> <span class="math-tex">\(72x \over 140\)</span></label></p><p><label class="radio"> <input type="radio"> <span class="math-tex">\(48x \over 210\)</span></label></p><p><label class="radio"> <input type="radio"> <span class="math-tex">\(210x \over 48\)</span></label></p><p><label class="radio"> <input type="radio"> <span class="math-tex">\(140x \over 72\)</span></label></p></div><div class="q-explanation"><p>Moles of gallium = mass/Ar = <span class="math-tex">\(x \over 70\)</span></p><p>Half equations: Ga<sup>3+</sup> (aq) + <u>3e</u><sup>–</sup> → Ga (s)<sub> </sub> and Mg<sup>2+</sup> (aq) + <u>2e</u><sup>–</sup> → Mg (s) so ratio of <strong>moles of electrons</strong> for gallium to <strong>moles of electrons</strong> for magnesium is 3:2.</p><p>This means that the ratio of moles of gallium : magnesium will be 2:3 (since the same number of electrons will pass through the circuit, but that will give more magnesium atoms as only two electrons are needed for each atom, rather than 3 for gallium).</p><p>Moles of magnesium = <span class="math-tex">\(x \over 70\)</span> × <span class="math-tex">\(3 \over 2\)</span></p><p>Mass of magnesium = moles × Ar = <span class="math-tex">\(x \over 70\)</span> × <span class="math-tex">\(3 \over 2\)</span> × 24</p><p>Which multiplied out gives <span class="math-tex">\(72x \over 140\)</span> which is therefore the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">7</div><div class="exercise shadow-bottom"><div class="q-question"><p>Which statements about a voltaic cell is/are correct, given the overall cell reaction?</p><p>2Ag<sup>+</sup> (aq) + Fe(s) → 2Ag (s) + Fe<sup>2+</sup>(aq) E<sup><s>o</s> </sup> = +1.25 V</p><p><strong>1: </strong>Electrons flow from the iron half-cell to the silver half-cell.</p><p><strong>2: </strong>The silver half-cell has a more positive standard electrode potential than iron.</p><p><strong>3: </strong>Silver is reduced and iron is oxidised.</p></div><div class="q-answer"><p><label class="radio"> <input class="c" type="radio"> 1, <span>2 and 3</span></label></p><p><label class="radio"> <input type="radio"> <span>1 and 3 only</span></label> </p><p><label class="radio"> <input type="radio"> <span>1 and 2 only</span></label> </p><p><label class="radio"><input type="radio"> 2 and 3 only</label></p></div><div class="q-explanation"><p>In a voltaic cell the redox reaction generates the charges on the electrodes and causes the current to flow. The half-cell highest in the electrochemical series (most negative) loses electrons (oxidation) causing the electrode to be negative, and the half-cell lowest in the electrochemical series (most positive) gains electrons (reduction) causing the electrode to be positive.</p><p>Therefore the iron half-cell must be more negative (E<sup><s>o</s></sup>) than the silver half-cell (since the iron loses electrons, which is oxidation) and the silver half-cell which gains electrons (reduction) is more positive (E<sup><s>o</s></sup>). Electrons will flow from negative to positive; from iron to silver.</p><p>Thus <strong>1, 2 and 3 </strong>is the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">8</div><div class="exercise shadow-bottom"><div class="q-question"><p>A spontaneous redox reaction takes place when two half-cells are connected. What must be true about the redox reaction?</p></div><div class="q-answer"><p><label class="radio"><input type="radio"> E<sup><s>o</s></sup><sub>cell</sub> must be positive and ΔG<sup><s>o</s></sup> must be positive</label></p><p><label class="radio"><input class="c" type="radio"> E<sup><s>o</s></sup><sub>cell</sub> must be positive and ΔG<sup><s>o</s></sup> must be negative</label></p><p><label class="radio"><input type="radio"> E<sup><s>o</s></sup><sub>cell</sub> must be negative and ΔG<sup><s>o</s></sup> must be negative</label></p><p><label class="radio"><input type="radio"> E<sup><s>o</s></sup><sub>cell</sub> must be negative and ΔG<sup><s>o</s></sup> must be positive</label></p></div><div class="q-explanation"><p>For any reaction to be spontaneous Gibbs Free Energy, ΔG<sup><s>o</s></sup>, must be negative.</p><p>And since ΔG<sup><s>o</s></sup> = −nFE<sup><s>o</s></sup><sub>cell </sub>(this should be remembered)<sub> </sub>the standard cell potential, E<sup><s>o</s></sup><sub>cell </sub>, will always be positive for a spontaneous reaction.</p><p>Therefore, <strong>E<sup><s>o</s></sup><sub>cell</sub> must be positive and ΔG<sup><s>o</s></sup> must be negative</strong> is the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">9</div><div class="exercise shadow-bottom"><div class="q-question"><p>Which solution forms both hydrogen and oxygen at the electrodes when a concentrated solution is electrolysed using inert electrodes?</p></div><div class="q-answer"><p><label class="radio"> <input type="radio"> KCl (aq)</label></p><p><label class="radio"> <input type="radio"> CuCl<sub>2</sub> (aq)</label></p><p><label class="radio"> <input type="radio"> <span>CuSO<sub>4</sub> (aq)</span></label></p><p><label class="radio"> <input class="c" type="radio"> K<sub>2</sub>SO<sub>4</sub> (aq)</label></p></div><div class="q-explanation"><p>The species discharged at the cathode/negative electrode (gaining e<sup>–</sup>) will be lower (less –ve) in the electrochemical series. Without the data booklet we must remember that the <strong>least reactive</strong> metal/hydrogen is discharged.</p><p>Water is lower than potassium so water is discharged preferentially to potassium, forming hydrogen gas (hydrogen is lower in the activity series than potassium). Copper is lower than water so copper will be preferentially discharged over water.</p><p>The species discharged at the anode/positive electrode (losing e<sup>–</sup>) will be higher (less +ve) in the electrochemical series. Again, without the data booklet we must remember that the <strong>least reactive</strong> non-metal is discharged.</p><p><strong>Note! Exception: </strong>Chloride ions (½Cl<sub>2(g)</sub> + e<sup>–</sup> ⇌ Cl<sup>–</sup><sub>(aq) </sub>E<sup><s>o</s></sup> = +1.36 V) are preferentially discharged over water (½O<sub>2(g)</sub> + 2H<sup>+</sup><sub>(aq)</sub> + 2e<sup>–</sup> ⇌ H<sub>2</sub>O<sub>(l)</sub> E<sup><s>o</s></sup> = +1.23 V) at the positive electrode despite their E<sup><s>o</s></sup> values (this is a kinetic effect that needs remembering).</p><p>Water is preferentially discharged over compound ions (like SO<sub>4</sub>, NO<sub>3</sub>, etc.) at the anode/positive electrode, forming oxygen gas.</p><p>Thus <strong>K<sub>2</sub>SO<sub>4</sub> (aq)</strong> is the correct answer, since water will be preferentially discharged at both cathode and anode, producing hydrogen and oxygen.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="label label-default q-number">10</div><div class="exercise shadow-bottom"><div class="q-question"><p>The overall equation for a voltaic cell is:</p><p>Sn (s) + Cu<sup>2+</sup> (aq)<sub> </sub>→ Sn<sup>2+</sup> (aq) + Cu (s) E<sup><s>o</s></sup><sub>cell</sub> = +0.48 V</p><p>Given the standard electrode potential for the copper half-cell, what is the standard electrode potential for the tin half-cell?</p><p>Cu<sup>2+</sup><sub>(aq)</sub> + 2e<sup>–</sup> ⇌ Cu<sub>(s) </sub> E<sup><s>o</s></sup> = +0.34 V</p><p>Sn<sup>2+</sup><sub>(aq)</sub> + 2e<sup>–</sup> ⇌ Sn<sub>(s) </sub> E<sup><s>o</s></sup> = ?</p></div><div class="q-answer"><p><label class="radio"> <input class="c" type="radio"> −0<span>.14 V</span></label> </p><p><label class="radio"> <input type="radio"> <span>+0.82 V</span></label> </p><p><label class="radio"> <input type="radio"> <span>−0.82 V</span></label> </p><p><label class="radio"> <input type="radio"> <span>+0.14 V</span></label> </p></div><div class="q-explanation"><p>In a voltaic cell the half-cell highest in the electrochemical series (most negative) loses electrons (oxidation) and the half-cell lowest in the electrochemical series (most positive) gains electrons (reduction).</p><p><strong>Red Cat: </strong>Reduction at cathode, <strong>An Ox: </strong>Oxidation at anode.</p><p><img alt="" src="../../images/redox-processes/redcatanox.jpg" style="width: 160px; height: 78px;"></p><p>The cell potential is the difference (as on a number line) in the potential of the two half-cells.</p><p>Or mathematically E<sup><s>o</s></sup>cell = E<sup><s>o</s></sup>cathode – E<sup><s>o</s></sup>anode</p><p>Therefore, E<sup><s>o</s></sup>anode = E<sup><s>o</s></sup>cathode – E<sup><s>o</s></sup>cell = +0.34 – +048 = −0.14 V</p><p>Thus <strong>−0.14 V</strong> is the correct answer.</p></div><div class="actions"><span class="score" data-score="0"></span><button class="btn btn-default btn-sm btn-xs-block text-xs-center check"><i class="fa fa-check-square-o"></i> Check</button></div></div><div class="totals"><span class="score"></span><button class="btn btn-success btn-block text-center check-total"><i class="fa fa-check-square-o"></i> Check</button></div></div><hr> </div> <div class="page-container panel-self-assessment" data-id="2731"> <div class="panel-heading">MY PROGRESS</div> <div class="panel-body understanding-rate"> <div class="msg"></div> <label class="label-lg">Self-assessment</label><p>How much of <strong>Redox AHL (HL only) paper 1 questions</strong> have you understood?</p><div class="slider-container text-center"><div id="self-assessment-slider" class="sib-slider self-assessment " data-value="1" data-percentage=""></div></div> <label class="label-lg">My notes</label> <textarea name="page-notes" class="form-control" rows="3" placeholder="Write your notes here..."></textarea> </div> <div class="panel-footer text-xs-center"> <span id="last-edited" class="mb-xs-3"> </span> <div class="actions mt-xs-3"> <button id="save-my-progress" type="button" class="btn btn-sm btn-primary text-center btn-xs-block"> <i class="fa fa-fw fa-floppy-o"></i> Save </button> </div> </div></div> <div id="modal-feedback" class="modal fade" tabindex="-1" role="dialog"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <h4 class="modal-title">Feedback</h4> <button type="button" class="close hidden-xs hidden-sm" data-dismiss="modal" aria-label="Close"> <span aria-hidden="true">×</span> </button> </div> <div class="modal-body"> <div class="errors"></div> <p><strong>Which of the following best describes your feedback?</strong></p> <form method="post" style="overflow: hidden"> <div class="form-group"> <div class="radio"><label style="color: #121212;"><input type="radio" name="feedback-type" value="Recommendation"> Recommend</label></div><div class="radio"><label style="color: #121212;"><input type="radio" name="feedback-type" value="Problem"> Report a problem</label></div><div class="radio"><label style="color: #121212;"><input type="radio" name="feedback-type" value="Improvement"> Suggest an improvement</label></div><div class="radio"><label style="color: #121212;"><input type="radio" name="feedback-type" value="Other"> Other</label></div> </div> <hr> <div class="row"> <div class="col-md-6"> <div class="form-group"> <label for="feedback-name">Name</label> <input type="text" class="form-control" name="feedback-name" placeholder="Name" value=" "> </div> </div> <div class="col-md-6"> <div class="form-group"> <label for="feedback-email">Email address</label> <input type="email" class="form-control" name="feedback-email" placeholder="Email" value="@airmail.cc"> </div> </div> </div> <div class="form-group"> <label for="feedback-comments">Comments</label> <textarea class="form-control" name="feedback-comments" style="resize: vertical;"></textarea> </div> <input type="hidden" name="feedback-ticket" value="082b9c9c4ae3624d"> <input type="hidden" name="feedback-url" value="https://studyib.net/chemistry/page/2731/redox-ahl-hl-only-paper-1-questions"> <input type="hidden" name="feedback-subject" value="7"> <input type="hidden" name="feedback-subject-name" value="Chemistry"> <div class="pull-left"> </div> </form> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary btn-xs-block feedback-submit mb-xs-3 pull-right"> <i class="fa fa-send"></i> Send </button> <button type="button" class="btn btn-default btn-xs-block m-xs-0 pull-left" data-dismiss="modal"> Close </button> </div> </div> </div></div> <style type="text/css" media="screen">/* Important part */
.modal-dialog{ overflow-y: initial !important
}
.modal-body{ overflow-x: auto; overflow-y: auto;
}</style><div id="modal-periodic-table" class="modal fade" tabindex="-1" role="dialog"> <div class="modal-dialog modal-lg" role="document" style="width: 90vw;"> <div class="modal-content"> <div class="modal-header"> <h4 class="modal-title">Periodic table</h4> <button type="button" class="close" data-dismiss="modal" aria-label="Close"> <span aria-hidden="true">×</span> </button> </div> <div class="modal-body"> <img src="../../../img/periodic-table/periodic-table-2020.png" style="max-width: 1400px; height: auto"> </div> <div class="modal-footer"> <button type="button" class="btn btn-default btn-xs-block m-xs-0 pull-right" data-dismiss="modal" aria-hidden="true"> Close </button> </div> </div> </div></div> </article> <hr class="hidden-md hidden-lg"> <div class="hidden-md hidden-lg mt-xs-3"> <button class="btn btn-default btn-block text-xs-center" data-toggle="modal" data-target="#modal-feedback" style="margin-bottom: 10px"><i class="fa fa-send"></i> Feedback</button> </div> </div> <input type="hidden" id="user-id" value="38342"></div><input id="ticket" type="hidden" value="082b9c9c4ae3624d"><input id="tzoffset" type="hidden" value="new"><input id="fp" class="fp" type="hidden" value=""></div><div id="std-footer"> <div class="wmap"> <div class="layout-wrapper"> <p> <a href="https://www.inthinking.net"> © <span id="footer-year"></span> <em>InThinking</em> <script>document.getElementById("footer-year").innerHTML = new Date().getFullYear();</script> </a> | <a target="_self" href="../../../about.html"> About us </a> | <a target="_self" href="../../../terms-and-conditions.html"> Legal </a> | <a target="_self" href="../../../contact.html"> Contact </a> </p> <p> <a class="social" target="_blank" href="https://twitter.com/#!/inthinker"> <img src="../../../img/social/twitter-square.svg"> Twitter </a> <a class="social" target="_blank" href="https://www.facebook.com/inthinking.net"> <img src="../../../img/social/facebook-square.svg"> Facebook </a> <a class="social" target="_blank" href="https://www.linkedin.com/profile/view?id=139741989"> <img src="../../../img/social/linkedin-square.svg"> LinkedIn </a> </p> </div> </div></div><script src="../../../js/jquery-1.11.3.min.js"></script><script src="../../../js/bootstrap.min.js"></script><script src="../../../js/jquery-fancybox/jquery.fancybox.min.js"></script><script>var pageId = 2731;</script><script type="text/javascript" src="../../../js/jqueryui/jquery-ui-custom.min.js"></script><script type="text/javascript" src="../../../js/jqueryui/jquery.ui.touch-punch.js"></script><script type="text/javascript" src="../../../js/std-quizzes-helpers.min.js?v=20220406"></script><script type="text/javascript" src="../../../js/std-quizzes.min.js?v=2022041300"></script><script type="text/javascript" src="../../../js/jqueryui/jquery-ui.min.js"></script><script type="text/javascript" src="../../../js/jqueryui/jquery.ui.touch-punch.min.js"></script><script src="../../../js/user/page-my-progress.min.js?v=202211221000"></script><script>var sAJAX='/pages/subjects/activity/user-stats-page.php?t=082b9c9c4ae3624d&p=2731&s=7&x=25015';var sData='k4iA6GSB03BgPm14aDOyIxiA6GSB0bfq7Y9FwFiA6GSBPFAF7YcHEKvrZ0fREzP5PBiBEYvNPucPUxQ1zuAlW3qRkzgl7YcAE0PlOzpySGKDSYBhWHOFIxiA6GSB0bfsEbOFwHRFWYK3EGyDPmjWOLLvIxi860fB7nBsWVOFwnEsWVaBIxiDSGigW3LsZGNFwFPFIxiA60f1Pm1F0xvmZYK8Z0ar7HB7IbpsE3K7IDPbODc7IbiBEYvNIGc1WxL1WxLhWnyqI0ps7YK4IUu870KB7bfjW3qDPHr=';var loopSecs = 30;var minSecsLog = 60;var lsKey = '7-83606-2731';</script><script src="../../../js/subjects/activity/user-stats-page.min.js?v=202205311700"></script><script src="../../../js/subjects/activity/my-favorites.min.js?v=20220610"></script><script src="../../../js/subjects/periodic-table.min.js"></script><script src="../../../js/subjects/feedback.min.js?v=202211221000"></script><script>var sessionUpdateSecs = 300;</script><script type="text/javascript" src="../../../js/session-updater.js"></script><script>(function(i,s,o,g,r,a,m){i['GoogleAnalyticsObject']=r;i[r]=i[r]||function(){(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),m=s.getElementsByTagName(o)[0];a.async=1;a.src=g;m.parentNode.insertBefore(a,m)})(window,document,'script','https://www.google-analytics.com/analytics.js','ga');ga('create', 'UA-98480796-1', 'auto');ga('send', 'pageview');</script><script src="../../../js/devicefp/devicefp.min.js"></script><script src="../../../js/jq-quickfit/jq-quickfit.min.js?v=20220201"></script><script src="../../../js/frontpage-subjects.min.js?v=202211161300"></script><script type="text/javascript" src="../../../js/studyib-jq.min.js?v=202211241300"></script><script type="text/javascript">$(document).ready(function(){ $('#trigger-modal-video-overview').click(function() { if( $('#modal-video-overview .modal-body iframe').attr('src').length == 0 ) { $('#modal-video-overview .modal-body iframe').attr('src', 'https://www.youtube.com/embed/hxxtdiLdTFk?rel=0'); } }); $('#modal-video-overview').on('hidden.bs.modal', function() { $('#modal-video-overview .modal-body iframe').attr('src', ''); }); });</script></body></html>