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Quote of the day
Science can never be a closed book. It is like a tree, ever growing, ever reaching new heights. Occasionally the lower branches, no longer giving nourishment to the tree, slough off. We should not be ashamed to change our methods; rather we should be ashamed never to do so.
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11 Oct 2026
The 2026 Nobel Prize for Chemistry
The Nobel prize for Chemistry this year celebrates the pioneering work of Henri Kagan and Kenso Soai on homochirality - the synthesis of just the required enantiomer of chiral compounds and not the mirror...
11 Sep 2026
The importance of using clear English in IB chemistry
Why using clear English is important when communicating in chemistry. This blog gives examples of two past IB questions where the language used to phrase the questions can lead to different interpretations...
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See all"As the solo chemistry teacher at an international school, introducing the IB, this site literally "saved my skin" -never felt alone and a wonderful resource. Highly recommended"
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Internationale Friedensschule Köln
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Alcanta International College
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R2.2 Rate of reaction & collision theory -
Julius, You have asked the same question on another page - for the answer see my reply to you in FAQ's...
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Hello Julius, See the page on fast track to tests which contains links to SL and HL mocks.
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Geoffrey
Site authorUPDATE! This is now possible! See the page "More than one teacher" as to how to...
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