When a manganous salt is fused with a mixture | vedclass

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(C) The fusion of a manganous salt $(Mn^{2+})$ with $KNO_3$ and solid $NaOH$ leads to the formation of potassium manganate $(K_2MnO_4)$.The chemical r

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$+6$

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(C) The fusion of a manganous salt $(Mn^{2+})$ with $KNO_3$ and solid $NaOH$ leads to the formation of potassium manganate $(K_2MnO_4)$.The chemical reaction is: $Mn^{2+} + 2NO_3^{-} + 4OH^{-} \rightarrow MnO_4^{2-} + 2NO_2^{-} + 2H_2O$.In $MnO_4^{2-}$, the oxidation state of $Mn$ is calculated as: $x + 4(-2) = -2$, which gives $x = +6$.Therefore, the oxidation number of $Mn$ changes from $+2$ to $+6$.

When a manganous salt is fused with a mixture of $KNO_3$ and solid $NaOH$, the oxidation number of $Mn$ changes from $+2$ to:

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