What is meant by the rate of a chemical reaction?
The total amount of product formed by the end of the reaction
The amount of reactant used or product formed per unit time
The temperature at which the reactant particles start to react
The total time taken for all of the reactant to be used up
54 exam-style questions on Edexcel GCSE Chemistry 8.1 Rates of reaction, covering 8.1.1 Measuring and interpreting rates of reaction, 8.1.2 Collision theory and the factors affecting rate, and 8.1.3 Catalysts and enzymes. Each one has a worked solution and a mark scheme showing where the marks go.