White anhydrous copper(II) sulfate is left in a stoppered flask with a few drops of water. Which change takes place, and why?
The forward reaction, because the solid is already anhydrous
The forward reaction, because the flask has been stoppered
The reverse reaction, because water has been added to the solid
The reverse reaction, because the flask has been stoppered
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.