State the observations at the anode and at the cathode during the electrolysis of :
fused lead bromide using graphite electrodes.

Explanation

At anode, the `Br^(-)` ion gives up electrons. Red brown bromine gas bubbles can be seen. At cathode, the `Pb^(2+)` ion accepts electrons. The electrolysis of lead bromide using graphite electrodes produces lead metal at the cathode as silvery grey deposits and bromine gas at the anode.
At the cathode: `Pb^(2+) + 2e^(-) rarr Pb`
At the anode: `2Br^(-) - 2e^(-) rarr 2Br`
`2Br → Br_2 uarr`