Question
Chemistry Question on Chemical Reactions
A current of 2 amp when passed for 5 hours through a molten salt deposits 22.2 g of metal of atomic mass 177. The oxidation state of the metal in the metal salt is:
A
(A) +1
B
(B) +2
C
(C) +3
D
(D) +4
Answer
(C) +3
Explanation
Solution
Explanation:
W=ItE96500∴E=W×96500It=22.2×965002×5×3600=59.5Equivalent mass (E)= Atomic mass oxidation state ⇒59.5=177n⇒n=17759.5∴n=2.97≈3Hence, the correct option is (C).