Answer to Question #171720 in General Chemistry for qitac

Question #171720

Use this information to answer the following question.

A student mixed some chlorine water with some potassium bromide solution and observed the colour change. He thought that a reaction had taken place but was slightly unsure. Describe another experiment the student could do, to determine whether he was right.

Expert's answer

Chlorine reacts with potassium bromide to form potassium chloride and bromine solution. Chlorine reacts with sodium iodide to make iodine and sodium chloride solution. Bromine reacts with potassium iodide to make potassium bromide and iodine.

When iodine chemically reacts with potassium bromide then it will lead to the formation of potassium iodide and bromine. This reaction is actually a single displacement reaction in which bromine from potassium bromide is displaced by iodine atom.

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