A student wrote this sentence about rates of reaction.
'A reaction gets faster when you heat it because the particles move faster.'
The student's sentence is not a complete explanation.
Give one further reason why heating a reaction mixture increases the rate of reaction.
Two gases react together in a sealed container. The pressure of the gases is increased.
Explain why the rate of reaction increases.
The student adds a catalyst to a different reaction. The student says that the catalyst will increase the mass of product made.
Explain why the student is wrong.
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.