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8. Acids and bases16 December 2022

For each question choose the answer you consider to be the best.1. Which species act as Brønsted - Lowry acids in the following reactions?NH2−(aq) + H2O(l) ⇌ NH3(aq) + OH−(aq) more

8 & 18. Acids & bases (1) 16 December 2022

For each question choose the answer you consider to be the best.1. Which is a Brønsted - Lowry conjugate acid/ base pair?A. H3O+ / OH–B. OH– / O2–C. H2SO4 / SO42– more

Printable versions of written tasks 15 December 2022

This page is for those who either do not wish to use to student access or who are unable to use it. It gives you direct links to pdf versions of all the 80 pages of short-answer questions on all the sub-topics... more

How to navigate the siteFree15 December 2022

This page gives a simple guide to help you find your way around the site to locate any page you want or to find any page that contains a particular word, part word or phrase using the search facility.... more

Topic 113 December 2022

A mole of carbonTopic 1 has a history of changing its name even though the content has essentially remained unchanged. It used to be called 'Stoichiometry' then it became 'Quantitative chemistry' and... more

The excitement of discovery 9 December 2022

Something to enthuse your students about how fantastic chemistry can be. This 7 minute video produced by NASA is well worth watching and showing to all your students, particularly when you are covering... more

MC test: Electron configuration8 December 2022

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You will need access to a periodic table (Section 6 of the IB data booklet).If you get an answer wrong, read through... more

The electron configuration of scandiumFree7 December 2022

The IB accepts either [Ar]4s23d1 or [Ar]3d14s2 as the correct electron configuration for scandium. This page is based on an academic paper I have recently had published in Foundations of Chemistry that... more

Start here7 December 2022

WELCOME!John Devonshire, my colleague for 26 years, arriving for work on a Monday morning.Welcome to the InThinking IB Diploma Chemistry website. Whether you are a teacher new to the IB or an experienced... more

Chemistry videos7 December 2022

Searching the Internet can produce some real gems for short videos. I’ve selected a range to get you started. Several sites are worth monitoring to see latest developments. One obvious one is You Tube... more