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 moreVirtual Think-Ins
Focus On: IB Teaching – A Practical Guide for Teachers new to the IB
20 November 2026
Find out moreInThinking Shorts
Getting the most out of InThinking Subject Sites
12 October 2026
Find out more
Getting the most out of InThinking Subject Sites
15 October 2026
Find out more
Chemistry: Getting the most out of the site
4 November 2026
Find out more
Find all InThinking events at
inthinking.net
Quote of the day
A science is any discipline in which the fool of this generation can go beyond the point reached by the genius of the last generation.
.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 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 my first year of full-time teaching, and I would not have survived so far without the vast pool of resources available on the InThinking Chemistry site. From teacher prep notes to lab suggestions to last-minute homework assignments to understandings..."
Rebecca Weber
International Academy of Macomb
"The InThinking Chemistry website by Geoffrey Neuss is a valuable resource. The presentations are useful and supplement my course textbook by giving students tasks throughout to check their understanding. The topic introductions provide points of interest..."
Nick Pinkerton
Tamagawa Academy K-12 & University
Subscriber comments
-
Hello Geoff, In R2.3.4, the IB guide talks about Le Chatelier's Principle to physical equilibria and gives a (g) / (aq) as an example. A very old IB question came up looking at a (l) / (g), and what happens when you increase the volume of liquid....
R2.3 The extent of chemical change -
Me too! As far as I know, there are no other issues with sodium hydroxide in the burette. My students frequently do it that way round. We just make sure that we don't leave the sodium hydroxide in the burette, and we rinse it out afterwards. The etching...
Acid-alkali titration -
In general, I find it easier to identify the colourless to pink colour change rather than pink to colourless. Is there any major issue with switching the acid and base other than that the sodium hydroxide may cause etching or other damage to...
Acid-alkali titration
Geoffrey
Site authorHello Harprit, R2.3.4 gives X(g) ⇌ X(aq) as an example so I guess students could be asked to explain why a bottle of carbonated water fizzes when the top is removed from the bottle and then eventually goes flat if the top is left off.
R2.3 The extent of chemical change