A reversible reaction takes place in a sealed container. Table shows the mass of product X in the container during the reaction.
Table: The mass of product X in a sealed container measured at six times during a reversible reaction
| Time in minutes | Mass of product X in g |
|---|---|
| 0 | 0.00 |
| 2 | 1.85 |
| 4 | 3.10 |
| 6 | 3.72 |
| 8 | 3.90 |
| 10 | 3.90 |
Use Table to give the time at which the reaction first reached equilibrium.
Explain how the data in Table show that equilibrium has been reached.
A student says that both reactions have stopped after 8 minutes. Explain why the student is wrong.
40 exam-style questions on AQA GCSE Chemistry 6.2 Reversible reactions and dynamic equilibrium, covering 6.2.1 Reversible reactions, 6.2.2 Energy changes and reversible reactions, 6.2.3 Equilibrium, 6.2.4 The effect of changing conditions on equilibrium, 6.2.5 The effect of changing concentration, 6.2.6 The effect of temperature changes on equilibrium, and 6.2.7 The effect of pressure changes on equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.