Describe the preparation of 12 mL of a 0.050 M solution of the following halogen, using the reaction below. Available to you are solid Ca(OCl)2; 0.20 M solutions of NaCl, NaBr, NaBrO3, and CuSO4,; a 0.40 M solution of NaI; a 0.50 M solution of H2SO4; distilled water; and a 10-mL graduated cylinder (where volumes can be read to the nearest 0.1 mL). Calculate the required quantity of the reagent and the volume of water that must be added for dilution.

chlorine water

2H+(aq) + OCl-(aq) + Cl-(aq) -- Cl2(g) + H2O(l)