Two solutions react together in a beaker. Which change will have no effect on the rate of this reaction?
Warming both of the solutions before mixing
Using a higher concentration of one solution
Crushing the solid used to make one solution
Adding a suitable catalyst to the mixture
41 exam-style questions on AQA GCSE Chemistry 6.1 Rate of reaction, covering 6.1.1a Calculating rates of reactions, 6.1.1b Gradient of a tangent as rate, 6.1.2 Factors which affect the rates of chemical reactions, 6.1.3 Collision theory and activation energy, and 6.1.4 Catalysts. Each one has a worked solution and a mark scheme showing where the marks go.