When aqueous bromine is added to a solution of sodium iodide, a displacement reaction occurs:
Br2(aq)+2NaI(aq)→2NaBr(aq)+I2(aq) \text{Br}_2(\text{aq}) + 2\text{NaI}(\text{aq}) \rightarrow 2\text{NaBr}(\text{aq}) + \text{I}_2(\text{aq}) Br2(aq)+2NaI(aq)→2NaBr(aq)+I2(aq)Explain, in terms of electron transfer, why this reaction is classified as a redox reaction.
106 exam-style questions on Edexcel GCSE Chemistry 7.2 Group 7, covering 7.2.1 Physical properties of the halogens, 7.2.2 Reactions of the halogens, 7.2.3 Relative reactivity and displacement reactions of the halogens, and 7.2.4 Halogen displacement as a redox reaction. Each one has a worked solution and a mark scheme showing where the marks go.