The course

1
Start here
The external examination: two papers, each 5 minutes perusal and 90 minutes working, each with a mix of question types on Units 3 and 4. The syllabus publishes no question counts.
Free: A tour of the chemistry course
2
Unit 3 Topic 1: Chemical equilibrium systems
6 of the 20 questions on each timed multiple-choice check
Dynamic equilibrium and Le Châtelier's principle Free: Kc, Q and Ksp Acids, bases and the Brønsted-Lowry model pH, Kw, Ka and Kb Indicators and titration curves 70 questions
3
Unit 3 Topic 2: Oxidation and reduction
4 of the 20 questions on each timed multiple-choice check
Oxidation states and redox equations Galvanic cells and electrode potentials Electrolytic cells and Faraday calculations 57 questions
4
Unit 4 Topic 1: Properties and structure of organic materials
6 of the 20 questions on each timed multiple-choice check
Free: Organic structures, names and isomers Homologous series and physical properties Organic reactions and pathways Amino acids, polymers and analytical techniques 66 questions
5
Unit 4 Topic 2: Chemical synthesis and design
4 of the 20 questions on each timed multiple-choice check
Industrial synthesis and yield Polymers, peptides and sugars 50 questions