A student says that a catalyst works by giving the reacting particles more energy so that more of them can react. Why is the student wrong?
A catalyst takes in energy from the reacting particles
A catalyst has no effect on the rate of the reaction
A catalyst is used up while the reaction takes place
A catalyst lowers the energy the particles need to react
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.