Rates of reaction – concentration
This classroom worksheet on rates of reaction and concentration is designed for a stand-alone KS4 lesson, homework or cover activity.
It includes a range of questions on concentration and a set of graph tasks. Includes answers for marking in class.
Example questions from the worksheet:
Increasing the concentration of reactants will increase the rate of reaction because the particles will be closer together and there will be more chance of a successful collision.
If the pressure of a gas is increased, the rate of reaction will increase too because there will be less space for the particles to move.
Sarah carried out an experiment that involves dropping a small piece of magnesium (0.1 g) into 10 cm3 of hydrochloric acid. She checked to see how much gas has been produced over a period of 70 seconds and found that it was 20 cm3.
- Use the information above to complete Sarah’s graph below.
- On the graph, show where the reaction was happening at the fastest and slowest rates.
- Explain why the rate changed during the experiment.
