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

Robert Nolan, Internationale Friedensschule Köln, Germany

You are doing a wonderful job by helping IB teachers to have materials which helps them prepare their lessons, especially with the new syllabus for 2016 exams. I cherish the way each topic gives a presentation which helps the teacher to arouse the interest...

Chidiebere Obi Machabeng College, International School of Lesotho, Lesotho

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, Japan

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Free IB-approved online EE writing course

3 May 2019

Image from FutureLearnStudents who want to improve their Extended Essay writing skills can now register for a new free FutureLearn course. The... more

Why you should recycle your old smartphone

18 March 2019

Two geologists, Dr Arjan Dijkstra and Dr Colin Wilkins from the University of Plymouth’s Sustainable Earth Institute have analysed the mineral... more

Subscriber comments

  • 21 May Maureen Luithle
    Thanks for the advice.
  • 20 May Geoffrey Neuss
    Hi Maureen, Five is usually a good number to aim for but it really does depend upon the research question and the nature of the investigation. Clearly time restraints can be a genuine problem so what is probably more important is how the student...
  • 20 May Geoffrey Neuss
    Hi Roshan, An interesting question! This of course is an example of a heterogeneous reaction and not really covered by the IB syllabus. Homogeneous kinetics, i.e. rate = k[reactants](raised to some power) does not apply to heterogeneous reactions...
  • 20 May Maureen Luithle
    Hi Geoff, How many trials do students have to do for the EE? In the past I have got students to do 5 trials. It does take a lot of time. Thanks, Maureen
  • 20 May Roshan Thomas
    I am sorry I put my question here.
  • 20 May Roshan Thomas
    Hi Geoff, How could one find out the order of reaction of a decomposition reaction, such as decomposition of solid potassium chlorate to form solid potassium chloride and oxygen? Since the reactant is a solid, there is no possibility of varying...
  • Hi Robert, See the following statement under Applications & skills in 10.1 in the current Guide. “Identification of typical functional groups in molecules e.g. phenyl, hydroxyl, carbonyl, carboxyl, carboxamide, aldehyde, ester, ether, amine,...
  • 17 May Geoffrey Neuss
    Rate-dependent factors
    Yes, Usually the question will involve a transition metal if there is a colour change but there are a few other cases (e.g. iodide ions to iodine or addition of bromine water to an alkene) where there will also be a colour change.
  • Question 4. Carboxyamide Is this a common term or is amide a better term. Thanks.
  • 17 May Nicholas Nannen
    Rate-dependent factors
    Thank you for all that specific information Professor Neuss. It makes sense to me. Based on what you said, I will wait and talk to my students specifically about colour change when we do oxidation in September/October. Sadly, I did not know...
  • Lina, 3-methylcyclohexene is a hydrocarbon that contains a ring and a double bond so it cannot have an IHD of zero. Its molecular formula is C7H12 and its IHD = 2.
  • 16 May Geoffrey Neuss
    Rate-dependent factors
    Hi Nick, Reactions involving transition metal complexes in which there is a change in ligand or oxidation state often also involve a change in colour so by using a colorimeter or spectrometer the rate can be followed by looking at the change...


Chemistry for the IB Diploma (Oxford IB)

The new edition of the Study Guide (which has sold over 150,000 copies) by Geoffrey Neuss for first exams in 2016.

more info