K_2MnO_4 can be converted into KMnO_4 by | vedclass

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Question

(D) The conversion of potassium manganate $(K_2MnO_4)$ to potassium permanganate $(KMnO_4)$ involves the oxidation of $MnO_4^{2-}$ to $MnO_4^-$. $1$.

Vedclass · Accepted Answer

All of these

Vedclass · Answer

(D) The conversion of potassium manganate $(K_2MnO_4)$ to potassium permanganate $(KMnO_4)$ involves the oxidation of $MnO_4^{2-}$ to $MnO_4^-$. $1$. Passing $CO_2$ gas: $3MnO_4^{2-} + 4H^+ \rightarrow 2MnO_4^- + MnO_2 + 2H_2O$. This is a disproportionation reaction in acidic medium. $2$. Passing $Cl_2$: $2MnO_4^{2-} + Cl_2 \rightarrow 2MnO_4^- + 2Cl^-$. This is an oxidation reaction. $3$. Electrolytic oxidation: $2MnO_4^{2-} + H_2O + [O] \rightarrow 2MnO_4^- + 2OH^-$. Since all three methods effectively convert $K_2MnO_4$ to $KMnO_4$,the correct option is $D$.

$K_2MnO_4$ can be converted into $KMnO_4$ by

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