Chemistry HW question

Question

If each of these ions were reduced to metal with one coulomb, which would yield the greatest mass?

(A) Cu^2+ (aq)

(B) Ag^+ (aq)

(C) Hg^2+ (aq)

(D) Cu^+ (aq)

Answer 1

ANSWER = (B) Ag⁺(aq)

A given amount of charge will reduce a given amount of charge. So, more of a species with a 1+ charge will be reduced compared to a species with a 2+ charge. That narrows it down to (B) Ag⁺ and (D) Cu⁺.

The greater mass will be that with the greater molar mass since an equivalent number of moles of each will be reduced. The answer would be (Ag⁺).