R2
How Much, How Fast, How Far?
Stoichiometry, kinetics, and chemical equilibrium: the math of reactions.
R2.1 Amount of Change
Calculations, reacting masses, limiting reactants, solution volumes.
→R2.2 Rate of Change
Collision theory, rate equations, activation energy, catalysts.
→R2.3 Extent of Change
Dynamic equilibrium, Kc expression, Le Chatelier's principle.
→Exam Practice
Exam-style questions with mark schemes, examiner tips, and cross-topic links. Each page covers MCQs, data analysis and structured questions.
AQA GCSE & IB Chemistry
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