250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO3 and 0.1 M AuCl. The solution was electrolyzed at 2 V by passing a current of 1 A for 15 minutes. The metal/metals electrodeposited will be:
Silver and gold in proportion to their atomic weights.
Faraday's - Second Law of electrolysis:
According to this law, if an equal amount of current is passed through an electrolytic solution containing more than one electrolyte, then the amount of substance deposited over the cathode is in the proportion of their equivalent weight.
Equivalent weight:
It is defined as the ratio of the atomic weight of the metal to the number of electrons required for the reduction of metal cation.
Explanation: