Question
Chemistry Question on Thermodynamics
0.066 g of a metal was deposited when a current of 2 ampere passed for 100 seconds through an aqueous solution of its metal ion. The equivalent mass of the metal is-
A
(A) 31.8
B
(B) 108.0
C
(C) 8.0
D
(D) 68.0
Answer
(A) 31.8
Explanation
Solution
Explanation:
Total charge passed in Coulombs = It = 2 X100 = 200 Coulombs 200 Coulombs of charge deposits 0.066 g of metal. Equivalent mass of the metal is that mass of metal deposited by 1 Farad or 96500 Coulombs. Equivalent mass of metal =96500×0.066200=31.845