Question

State the electrode reaction at the anode during electrolysis of fused lead bromide.

Answer 1

Anode reaction at electrolysis of fused lead bromide.

• The Oxidation half reaction is taking place at the anode.
• Bromide ions give up electrons to the anode and then turn into neutral bromine atoms hence the neutral bromine atoms form covalent bromine molecules.
• Product at the anode: Bromine. Reddish-brown vapors are seen at the anode and then bromine vapors are evolved from the molten lead bromide.

$$\begin{gathered} {\mathrm{Br}}^{-}-{\mathrm{e}}^{-}\to \mathrm{Br} \\ \mathrm{Br}+\mathrm{Br}\to {\mathrm{Br}}_2 \end{gathered}$$