When chloride ions are added to a pink solution containing cobalt ions, the mixture turns blue.
This is a reversible reaction.
pink solution+chloride ions⇌blue solution+water \text{pink solution} + \text{chloride ions} \rightleftharpoons \text{blue solution} + \text{water} pink solution+chloride ions⇌blue solution+waterWhat effect does the removal of chloride ions have on the colour of the blue mixture?
turns pink
turns darker blue
turns colourless
does not change colour
38 exam-style questions on Edexcel GCSE Chemistry 5.2 Reversible reactions and equilibria, covering 5.2.1 Reversible reactions and dynamic equilibrium, 5.2.2 The Haber process, and 5.2.3 Changing the position of a dynamic equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.