Question

how can prepare KMno4 by electrolytic method ?​

Answer 1

The reaction between Manganese oxide and potassium hydroxide followed by the electrolytic oxidation to give potassium permanganate.

Step by step explanation:

Preparation of $\bold{KMnO_{4}}$:

The reaction between $MnO_{2}$ and KOH forms $MnO_{4}^{2-}$.Then followed by electrolytic oxidation.

In this oxidation reaction , peroxodisulphate oxidizes the managanese ion to permanaganate ion.

The chemical reaction is a follows.

$\bold{2Mn^{2+}+5S_{2}O_{8}^{2-}+8H_{2}O\rightarrow 2MnO_{4}^{-}+10SO_{4}^{2-}+16H^{+}}$

The obtained potassium permanagante is present in the dark purple colored.

$\bold{2KMnO_{4}\rightarrow K_{2}MnO_{4}+MnO_{2}+O_{2}}$

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