Manganese(IV) oxide (MnO2\text{MnO}_2MnO2) is a solid catalyst used to speed up the decomposition of hydrogen peroxide.
Devise a simple experiment to show that the mass of the manganese(IV) oxide catalyst does not change during this reaction.
87 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.