State Faraday's Laws of electrolysis.

Explanation

First Law : The mass of a substance (m) liberated as an electrode during electrolysis is directly proportional to the quantity of electricity (Q) passed through the cell.
i.e., m `propto ` Q. But `Q = I xx t`, where I is the current strength in amperes and `t` is the time in seconds , to which the current is passed.
Therefore, `m propto I xx t` (or)
`m = Z xx I xx t ` where .Z. is
Known as electrochemical equivalent of the substance.
Second law : When the same quantity of electricity (charge) is passed through the solutions of different electrolytes, the amount of substances liberated at the respective electrodes are directly proportional to their electrochemical equivalents.