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  • Progress in carbon capture?

    This blog looks at a promising recent development which could lead to capturing carbon dioxide emissions from the combustion of fossil fuels...

  • A pedantic chemist

    Authoring this website, writing IB examination questions and my Study Guide etc. has made me become quite a pedantic chemist! Apologies for...

Subscriber commentsSee all

  • 15 March 2024
    Geoffrey Neuss
    R1.1 Measuring energy changes
    Hi Demet, Just to add to what Paul has written. The enthalpies of formation are both exothermic, so although liquid water has the lowest negative value it gives out more heat during its formation. Less heat is given out when steam is formed...
  • 15 March 2024
    Geoffrey Neuss
    Metals and ICP spectroscopy
    Hi Kate, Yes you are correct - please thank your student for spotting it and alerting you. I'm not sure how this happened but it is corrected now.
  • 15 March 2024
    Geoffrey Neuss
    Printable versions of MC Topic tests
    Kate, Please thank your students for finding these typos. They are corrected now.
  • 15 March 2024
    Geoffrey Neuss
    R1.2 Energy cycles in reactions
    Mona, Many thanks for spotting and reporting this. I have now updated the slide gallery.,

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  • As we begin a new syllabus in Chemistry, this website has been a place to gain insight and to share ideas. This website guides my planning and delivery of lessons. The links to TOK and the learner profile suggestions help me make meaningful connections...

    Melanie Kells, Canadian International School (India)

  • Wish I had subscribed to this site years ago. Great materials, examples and explanations. Definitely worth it!

    Jeff Hinton, Greengates School (Mexico)

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