Question
Explain how hydrogen peroxide can be obtained by electrolysis method.
✓
Answer
$i. H2O2$ can be manufactured by electrolysis of $50\% \ H2SO4.$ In this method, $50\%$ solution of $H2SO4$ is subjected to an electrolytic oxidation to form peroxydisuiphuric acid at anode.
At anode$: 2 HSO _4^{-} \xrightarrow{\text { Electrolysis }} \underset{\text{Peroxydisulphuric acid}}{H _2 S _2 O _8+2 e ^{-}}$
$ii.$ On hydrolysis, peroxy sulphuric yields hydrogen peroxide.
$iii.$ This method can be used for the laboratory preparation of $D_2O_2.$
At anode$: 2 HSO _4^{-} \xrightarrow{\text { Electrolysis }} \underset{\text{Peroxydisulphuric acid}}{H _2 S _2 O _8+2 e ^{-}}$
$ii.$ On hydrolysis, peroxy sulphuric yields hydrogen peroxide.
$iii.$ This method can be used for the laboratory preparation of $D_2O_2.$
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