Chemical reactions happen at different rates in everyday life. Milk goes sour more slowly in a fridge, and indigestion powder works faster than an indigestion tablet.
Give two factors, other than using a catalyst, that affect the rate of a reaction in solution.
Explain why milk goes sour more slowly in a fridge than on a kitchen table.
Indigestion powder reacts with stomach acid faster than the same mass of indigestion tablet. Explain why.
For a reaction to happen, particles must collide with enough energy. Give the name of the minimum amount of energy needed for a reaction to happen.
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.