The mass of copper deposited from a solution of CuSO4 by passage of 5 A current for 965 second is(Mol. wt. of Copper = 63.5)

Current (I) = 5 A and time (t) = 965 secWe know that equivalent weight of copper                =Molecular weightValency=63.52and quantity of electricity passed in coulomb =current×time=5×965=4825 C. Since 96500 coulombs will deposit 63.52g of copper, therefore 4825 coulombs will deposit               =63.5×482596500×2=1.5875 g