The same current is passed for the same time through solutions of AgNO3 and CuSO4 connected in series. How much silver will be deposited if 1.0 g of copper is produced?
[Cu = 63.5, S = 32, O = 16, Ag = 108, N = 14]
[Cu = 63.5, S = 32, O = 16, Ag = 108, N = 14]
-
A.
1.7 g -
B.
3.4 g -
C.
6. 8 g -
D.
13. 6 g
Correct Answer: Option B
Explanation
From Faraday;s second law of electrolysis
(frac{text{Mass of silver deposited}}{text{Mass of copper deposited}}) = (frac{text{Equivalent mass of silver}}{text{Equivalent mass of copper}})
(frac{text{Mass of silver deposited}}{1.0g}) = (frac{108}{63.5})
= 31.75g
Copper is devalent = Cu2+
Mass of silver deposited = (frac{108g}{31.75g})
= 3.30g