If electrolysis of CuSO4 solution is carried out with 100g impure Cu as anode of 90% purity and pure Cu of mass 1009 as cathode by passing 2 amp. current for 9650 sec. Then mass of cathode and anode will be: (At. mass of Cu = 63)
At cathode Cu2+ + 2e- → Cu 0.1 mole deposited
Weight of cathode = 100 +0.1 x 63
= 106.3 gm
At anode Cu + Cu2+ + 2e-
= 93 gm