A student is provided with solutions of three halogens: chlorine water, bromine water, and iodine solution. They also have solutions of three potassium halide salts: potassium chloride, potassium bromide, and potassium iodide. Explain how the student could use these solutions to carry out displacement reactions, describing the observations they would make and explaining how these results show the order of reactivity of chlorine, bromine, and iodine.
Practise Edexcel GCSE Chemistry Group 7 with exam-style questions for Foundation and Higher tier. 87 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.