Question

What would be observed when

Chlorine water is added to an aqueous solution of potassium iodide

Answer 1

Chlorine reacts with potassium iodide to form potassium chloride and iodine

The equation for the reaction is;

$Cl _{2_{(aq) }}+ 2KI_{(aq)} → 2KCl_{(aq)} + I _{2_{(aq)}}$

The formation of iodine makes the reaction mixture turn darker

In this reaction, a more reactive halogen can displace a less reactive halogen from solutions of its salts.