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Latest updates

SL Multiple choice tests on individual topics5 July 2019

For more information about the multiple choice tests and to download the blank answer sheet see Multiple choice tests for each topic1. Stoichiometric relationships (1) 1. Stoichiometric relationships... more

104Ku - an anachronism in a gulag26 June 2019

I was reading an article recently on Dark Tourism which describes a visit in 2017 to Karlag, a former Soviet gulag near Karaganda in Kazakhstan. I visited this gulag two years earlier in 2015 and the... more

Metals & ICP spectroscopy questions9 June 2019

1. Aluminium is produced by electrolysing a molten solution of alumina, Al2O3, in cryolite, Na3AlF6, using graphite electrodes.(a) Explain why a molten solution of the alumina dissolved in cryolite is... more

Materials science introduction questions 3 June 2019

1. Elemental copper does occur in nature, but copper is mainly extracted from its sulfide, carbonate or oxide minerals. Tin does not occur naturally in the elemental state. The main ore of tin is cassiterite,... more

Reducing global warming by increasing CO2 concentration in the atmosphere28 May 2019

Option C (sub-topic C.5 Environmental impact – global warming) covers the science behind global warming and relates the concentrations of different greenhouse gases in the atmosphere with their global... more

Free IB-approved online EE writing course2 May 2019

Image from FutureLearnStudents who want to improve their Extended Essay writing skills can now register for a new free FutureLearn course. The University of Leeds in the UK has designed this online course... more

Advice to students (Paper 3)6 April 2019

1. Revision. Go through the syllabus thoroughly for the option you have studied checking that you know and understand the chemistry given in the syllabus under 'Nature of Science', 'Understandings', 'Applications... more

Advice to students (Paper 2)6 April 2019

1. Revision. As for Paper 1 go through the syllabus thoroughly checking that you know and understand the chemistry given in the syllabus under 'NoS', 'Understandings', 'Applications and skills' and 'Guidance'... more

Advice to students (Paper 1)6 April 2019

1. Revision. Go through the syllabus thoroughly checking that you know and understand the chemistry given under 'Nature of Science', 'Understandings', 'Applications and skills' and 'Guidance' for each... more

Analysis of Cu(II) ions in solution 19 March 2019

The use of a visible spectrophotometer is not specifically mentioned under the Mandatory laboratory components and in fact the Beer-Lambert Law only really needs to be taught if your Higher Level students... more