A solid reacts with a solution. Which change increases rate without changing the quantities of reactants?
Using less solution
Removing some solid
Diluting the solution
Crushing the solid
122 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.