A student heats blue hydrated copper(II) sulfate crystals in a boiling tube until the solid has turned white. The student then lets the tube cool and adds a few drops of water to the white solid.
hydrated copper(II) sulfate ⇌ \rightleftharpoons\,⇌ anhydrous copper(II) sulfate + water
Describe what the student would observe during this experiment and explain what the observations show about the reaction.
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.