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NOS & Critical Thinking9 June 2020

In order to think critically in chemistry a knowledge of both chemistry and the nature of science is required. This page gives a simple example of this then provides a full worked example you can give... more

Areas of difficulty9 May 2020

I’ve been marking IB Chemistry papers now for a long time and there are several areas that every year many students seem to find particularly difficult. Some of these (such as hybridization) we might... more

Understanding hybridization4 May 2020

The theory of hybridization is developed by first considering how atomic orbitals combine to form molecular orbitals which then leads on to how hybrid orbitals are formed. The relationships between shapes,... more

Delivering distance learning4 May 2020

In these unprecedented Covid-19 times schools in some countries are beginning to reopen whereas in other parts of the world they remain firmly closed. Different countries have different experiences of... more

HL Practice Paper 1 exams 19 April 2020

The following 40 multiple choice questions are set out in 'quiz' format and are completely different questions to the questions in the Multiple choice tests for each topic and the quiz questions for each... more

SL Practice Paper 1 exams19 April 2020

The following 30 multiple choice questions are set out in 'quiz' format and are completely different questions to the questions in the Multiple choice tests for each topic and the quiz questions for each... more

A.8 Superconducting metals & X-ray crystallography 18 April 2020

Written specifically for students to provide help and support for the IB Diploma chemistry programme this page provides full coverage of the syllabus content of Option A - sub topic A.8. It encourages... more

2. Atomic structure10 April 2020

For each question choose the answer you consider to be the best.1. Which is the correct definition of the atomic number of an atom?A. The total number of neutrons and protons in the nucleus of an atom more

9 & 19. Redox processes (2) 2 April 2020

For each question choose the answer you consider to be the best.1. In which species does manganese have an oxidation state of +3? A. MnSO4B. KMnO4C. Mn2O3 more

IB Updates27 March 2020

It is important to know and follow the official announcements from the IB about how the current pandemic affects the cancelled examination session in May 2020.This can be found at https://www.ibo.org/news/news-about-the-ib/covid-19-coronavirus-updates/... more