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Understanding the activity series10 September 2019

There can be considerable confusion for standard level students over the position of certain metals in the activity series given in Section 25 the IB data booklet. One of the understandings in the IB... more

Complete course for studentsfree22 October 2019

The purpose of this section is to provide complete syllabus coverage specifically for students who have been signed up to student access by their teacher in a subscribing school. Once your school has... more

MC test: Electron configuration25 August 2017

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You will need access to a periodic table (Section 6 of the IB data booklet).If you get an answer wrong, read through... more

Understanding and using ΔG 7 October 2019

ΔG is the change in free energy for a chemical reaction. If it is measured under standard conditions then it is known as the standard free energy change and has the symbol ΔG⦵. If the value of ΔG⦵... more

Paper 1 (Multiple Choice)3 February 2014

A. I and II only B. I and III only C. II and III only D. I, II and III more

MC test: Electrons in atoms25 August 2017

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You will need access to a periodic table (Section 6 of the IB data booklet).If you get an answer wrong, read through... more

Creating student accounts free27 August 2019

Beneath your name on the home page you will see 'My account' and 'Student access'.Note that you can gain student access from any page (not just the home page) simply by clicking on the arrow by your name... more

Identification from spectra: Question 10 free22 October 2019

Identify compound J from the data (a – d) given and explain how you arrived at your answer.a) Elemental analysis of compound JElementPercentage by massCarbon70.56 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

The Nature of Sciencefree16 June 2019

I received an e-mail from a student (not someone I teach) which included the following:"Since I am new to the IB, could you tell me what has been the toughest topic for students generally in the exams... more

Computer modelling & simulations 12 February 2019

During your practical programme you need to explain the importance (and limitations) of using computer models to simulate experiments and each student should have personal experience of using computer... more

Identification from spectra: Question 20 7 August 2019

Identify compound T from the data (a – d) given and explain how you arrived at your answer.a) Elemental analysis of compound TElementPercentage by massCarbon85.60 more

20.1(1) Nucleophilic substitution free27 November 2018

Written specifically for students to provide help and support for the IB Diploma chemistry programme this page provides full coverage of nucleophilic substitution, the first part of the syllabus content... more

MC test: Nucleophilic substitution7 October 2017

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You will need access to a periodic table (Section 6 of the IB data booklet).If you get an answer wrong, read through... more

Convergence limits1 October 2018

In sub-topic 12.1 Electrons in atoms underneath 'Applications and skills' it states "Calculation of the value of the first ionization energy from spectral data which gives the wavelength or frequency... more

MC test: Electrochemical cells (AHL)27 September 2017

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You will need access to a periodic table (Section 6 of the IB data booklet). You may find a calculator helpful to answer... more

MC test: Hybridization6 September 2017

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You will need access to a periodic table (Section 6 of the IB data booklet).If you get an answer wrong, read through... more

Critical thinking9 June 2019

A few years ago, Tesco’s, a large UK supermarket chain, put out a statement about its Christmas trading called ‘Tesco’s Christmas in numbers’.Part of the statement said:“Tesco will also sell... more

MC test: Further aspects of covalent bonding3 September 2017

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. You will need access to a periodic table (Section 6 of the IB data booklet).If you get an answer wrong, read through... more

Superconducting metals & X-ray crystallography 27 March 2019

In January 2017 yet another revised version of the data booklet became available. However there is still a real problem with the atomic radii given for the elements in Groups 1, 2 and 13.The images below... more

MC test: Nuclear fusion & nuclear fission (HL)12 December 2017

Use the following 'quiz' to test your knowledge and understanding of this sub-topic. As this relates to a sub-topic on the options you may need access to the IB data booklet.If you get an answer wrong,... more

How useful are oxidation states?25 October 2018

Paradigm shifts often occur when an established theory has to be ever more distorted to account for observable facts and to make accurate predictions. I wonder if the time is coming soon when the concept... more