White anhydrous copper(II) sulfate, water vapour and blue hydrated copper(II) sulfate reach equilibrium in a sealed transparent container.
white anhydrous copper(II) sulfate+water vapour⇌blue hydrated copper(II) sulfate \text{white anhydrous copper(II) sulfate} + \text{water vapour} \rightleftharpoons \text{blue hydrated copper(II) sulfate} white anhydrous copper(II) sulfate+water vapour⇌blue hydrated copper(II) sulfateThe forward reaction is exothermic. The solid mixture is pale blue at equilibrium.
The container is cooled slightly and left until a new equilibrium is reached.
Predict the final colour of the solid mixture. Explain your answer.
124 exam-style questions on OCR GCSE Chemistry 5.3 Equilibria, covering 5.3.1 Reversible reactions and dynamic equilibrium and 5.3.2 Changing the position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.