Chlorine gas is bubbled through an aqueous solution of potassium iodide until a change in colour is seen.
Write a chemical equation for this reaction.
Explain the reaction that occurs. In your answer, refer to: the final colour, the substance that causes the final colour, the type of reaction, and the relative reactivities of the two Group 7 elements involved.
33 exam-style questions on Edexcel IGCSE Chemistry Group 7 (halogens) – chlorine, bromine and iodine. Each one has a worked solution and a mark scheme showing where the marks go.