A solution of Ni(NO3)2 is electrolysed between platinum electrodes using a current of 5.0 ampere for 20 minutes. What mass of nickel will be deposited at the cathode ? (At. mass of Ni = 58.7)
Quantity of electricity passed = (5 A) × (20 × 60 s) = 6000 C, Ni2+ + 2e– Ni
Thus, 2 F, i.e., 2 × 96500 C deposit Ni = 1 mole, i.e., 58.7 g,
