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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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  • This is my go to resource for teaching IB HL Chemistry. I have been teaching for the past 19 years and I can say this is by far the best resource that I have ever taught with. The website taught me how to efficiently teach with the most clarity. My IB...

    Neil Corrigan, St Edward High School (USA)

  • You are doing a wonderful job by helping IB teachers to have materials which helps them prepare their lessons. I cherish the way each topic gives a presentation which helps the teacher to arouse the interest of the learners before moving into the main...

    Chidiebere Obi Machabeng College, International School of Lesotho (Lesotho)

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