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Permanganate is used to oxidize acidified oxalate. In this reaction, an auto catalyst is formed, determine the oxidation state of that auto catalyst.

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answer is 2.

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Detailed Solution

The given reaction is an oxidation reaction in which oxalate undergo oxidation with permanganate in acidic medium.

The balanced equation is:

$5 C_{2} O_{4} {}^{2 -}+ 3 H_{2} {S O}_{4} + 2 {K M n O}_{4} ⟶ 2 {M n S O}_{4} + K_{2} {S O}_{4} + 10 {C O}_{2} + 8 H_{2} O$

The oxidation state of manganese in ${K M n O}_{4}$ is +7. ${M n S O}_{4}$ acts as auto catalyst whose oxidation state is +2.

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