Question

10.3975 gm concentrated solution of CuSO4 is electrolysed for 100 sec using 9.65 amp current. The mass of resultant solution after electolysis is:
(C) 9.0 gm (b) 9.5 gm (a) 10 gm (d) 8.5 gm.​

Answer 1

Answer:

Cu

2+

+ 2e

−

→ Cu

so, 1 faraday deposits 0.5 mole of Cu

0.01 faraday deposits Cu = 0.5∗0.01 = 0.005 mole

1 mole of Cu = 63.5 g

0.005 mole = 0.3175 g of Cu

so, the mass of resulting solution = 10−0.31

the mass of resulting solution= 9.6