Two experiments use the same mass of magnesium and excess acid. Experiment X has a steeper initial graph but the same final gas volume as Y. Which change could cause this?
Carrying out X at a lower temperature
Using a larger volume of the same acid in X
Using a higher acid concentration in X
Using a more dilute acid in X
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.