Reaction of halogen with potassium halide

[thamwenyin]

I conducted a experiment to determine the order of oxidizing ability of the halogens in aqueous solution. Halogens were reacted with potassium halide solution. Why hexane was added in this experiment to indicate the changes of colour and to determine whether displacement of halogen occur?

 

[Borek]

Think in terms of solvent polarity.