When an acid of a metal conducts electricity in a salt or alkali solution or acid mixed water , the molecules of the solution split and accumulate at the anode and cathode. Electrolysis is the process of splitting the molecules of a solution through electric current. For example, in copper sulphate solution, D.C. When flowing, the solution splits into copper and sulphate and copper is deposited at the cathode and sulphate at the anode.