In which case would the least number of faradays of electricity be required for the liberation of 1.0 g?

Question

1.0 g of free metal?

K 39.1 g per mol, Na 23.0 Cu 63.5 Ag 107.9

a) k from molten KOH

b) Na from molten NaCl

c) Cu from aqueous CuSO4

d) Ag from aqueous AgNO3

I need detailed explannation as well. Thank you

Answer 1

d) Ag because it is monovalent (+1) and has a high atomic weight (grams per mole and therefore grams per faraday.