Question

Two different electrolyte cells are connected in series , containing aq. AGNO3 and aq. CUSO4 respectively . The mole ratio of copper to silver deposited at cathode in two cells will be A = 1/2 B= 2/1 C= 3/2 D= 2/3 ​

Answer 1

Answer:

1/2 is right answer

in series molar ratio of both is equal (W/E)

Answer 2

0.27 mol

Explanation:

According to Faraday's second law:

moles of Al

moles of Cu = chemical equivalent of Al/chemicaf eqivalent of Cu

Chemical equivalent= valency/atomic weight

For CuSO4

Cu2+ +2e- ​→Cu

and for AlCl3

​

Al3+ +3e− →Al

Thus, Chemical equivalent of Cu = 2

and Chemical equivalent of Al = 3

putting these value in equation (1)

moles of Al0.4

=1×2

moles of Al= 0.4×2=0.266≈0.27 mol