3(b)
State the observations at the anode and at the cathode during the electrolysis of :
(i) fused lead bromide using graphite electrodes.
(ii) copper sulphate solution using copper electrodes.
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(i) The observations at the anode & at the cathode are:
At cathode — silvery grey deposit of lead metal.
At anode — reddish brown fumes of bromine vapours.
(ii) The observations at the anode & at the cathode are:
At cathode — Brownish pink copper metal is deposited at cathode during electrolysis of copper sulphate.
At anode — Copper ions are formed. Copper anode diminishes in mass.
Blue colour of CuSO4 remains unchanged.