Question

Give the chemical equation for the reactions occurring at the anode during the electrolysis of molten lead bromide using a platinum anode.

Answer 1

Electrolysis of Lead Bromide $\left({\mathrm{PbBr}}_2\right)$ solution using a platinum anode

Chemical equation

During the electrolysis of Lead bromide

$\underset{\mathrm{Lead}\mathrm{Bromide}}{{\mathrm{PbBr}}_2\left(\mathrm{aq}\right)}\stackrel{\mathrm{Electricity}}{\to }\underset{\mathrm{Lead}\mathrm{ion}}{{\mathrm{Pb}}^{2+}}+\underset{\mathrm{Bromide}\mathrm{ion}}{{{\mathrm{Br}}_2}^{-}}$

Ions present

${\mathrm{Pb}}^{2+},{\mathrm{Br}}^{-}$

At cathode

${\mathrm{Pb}}^{2+}+2{\mathrm{e}}^{-}\to \mathrm{Pb}$

At anode

${\mathrm{Br}}^{-}-{\mathrm{e}}^{-}\to \mathrm{Br}$