Home of real teaching & learning
- Full support for teachers
- Focus on critical thinking
- Engaging classroom activities
- Integrated student eBook
- Assessed tasks / qBank
- Practice exam questions
The InThinking Guarantee: Our sites are written by expert practitioners and not by AI
See our AI policyDisclaimer: InThinking subject sites are neither endorsed by nor connected with the International Baccalaureate Organisation.
Don't miss out, find out!
- Free trials Take out a one month free trial today!
- Newsletters Subscribe to our FREE subject site newsletters.
Recommendations
Read what users are saying about the site.Site authors
IB Approved Workshops
Chemistry
IB DP Category 2
Barcelona, Spain, 12 - 14 February 2027
Find out more
Chemistry: A focus on the experimental programme
IB DP Category 3
Paris, France, 19 - 21 February 2027
Find out more
Virtual Think-Ins
Focus On: IB Teaching – A Practical Guide for Teachers new to the IB
20 November 2026
Find out more
Keys to Success: The IA in Chemistry
30 November 2026
Find out more
Find all InThinking events at
inthinking.net
Quote of the day
Every great scientific truth goes through three states: first, people say it conflicts with the bible; next, they say it has been discovered before; lastly, they say they always believed it.
.png)
InThinking
Supporting international schools with high quality PD & interactive online resources
Dynamic
Creative
Personal
Creative
Personal
Selected student pages
See all
Most popular
See all
Blog
Free
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...
Recommendations
See all"This is an outstanding and excellent resource. I found it very useful for me and my students. The website covers all the needed details for the teachers and the students."
Osama Salah
Modern American School of Egypt
"This website has certainly encouraged me and my students to think CRITICALLY about chemistry. I genuinely enjoy reading Pause for Thought and try my best to embed some thought-provoking questions in every lesson. I have been inspired by your articles..."
SunKyung Lee
Beijing Dulwich International School
Subscriber comments
-
There is a question in Nov 25 (Q16, SL P1A, TZ1) where students were expected to figure out that the combustion of nitrogen to form NO is endothermic. It seems students should do so through a process of elimination, since the other three are classic...
R1.3 Energy from fuels -
UPDATE! This is now possible! See the page "More than one teacher" as to how to...
Using student access -
Thank you very much.
R2.2 Rate of reaction & collision theory
Geoffrey
Site authorHello Rafael, I don't think the question is unreasonable. An energy profile is given which shows the reaction is endothermic. The three 'wrong' responses are the formation of the H-H(g) bond from H(g) atoms, the neutralization of NaOH(aq)...
R1.3 Energy from fuels