2.13 describe experiments to demonstrate that a more reactive halogen will displace a less reactive halogen from a solution of one of its salts

2.13 •more reactive halogens displaces less reactive ones

        •for example: chlorine water + potassium iodide = potassium chloride + iodine 

                  •the solution turns brown as the iodine is displaced 

        •add drops of the halogen solution to the salt halide solution and look for the colour change