Question

When the same electric current is passed through the solution of different electrolytes in series, the amount of elements deposited on the electrodes are in the ratio of their:

• A. atomic numbers
• B. atomic masses
• C. specific gravities
• D. equivalent masses

Answer 1

Answer: (D)

The masses of different substances deposited or liberated, when the same quantity of current is passed through different electrolytes, connected in series are proportional to their chemical equivalent masses.

Consider three different electrolytes, $AgN{O}_3,CuS{O}_4,andAl(N{O}_3{)}_3$ solutions, connected in series. The same quantity of current is passed through them, then the masses of Ag, Cu, and Al, deposited on their respective • electrodes would be directly proportional to their equivalent masses. Atomic mass of the element