A student investigates the rate of reaction between magnesium ribbon and dilute hydrochloric acid.
The experiment is repeated three times:
In each case, all other conditions are kept the same.
Select the correct word in each row to show the change in the rate of reaction.
| Case | Change in rate of reaction | ||
|---|---|---|---|
| Magnesium ribbon is cut into smaller pieces | faster | slower | unchanged |
| The temperature of the acid is lower | faster | slower | unchanged |
| The reaction is carried out in a larger beaker | faster | slower | unchanged |
127 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.