Iodine was permitted to distribute between water and CCI4. When 50 mL of aqueous layer was treated with l M Na2S2O3 solution, 5 mL of Na2S2O3 were used up. l mL of CCI4 layer consumed 17 mL of 0.5M Na2S2O3 solution. Calculate the partition coefficient of l2 in between CCl4 and H2O.