When the same charge is passed through the solutions of different electrolytes in series, the amounts of elements deposited on the electrodes are in the ratio of their

Farady's second law:

 It states that “ The masses of different substances, liberated or dissolved by the same amount of electricity, are proportional to their equivalent masses”.

$\mathrm{W} \mathrm{\alpha } \mathrm{E}$

W= mass of substance deposited. 

E= equivalent mass .