Number of moles of ions required by 1 mole of to oxidise oxalate ion to is

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Solution

Q.
Number of moles of $H^{+}$ ions required by 1 mole of ${MnO}_{4}^{-}$ to oxidise oxalate ion to ${CO}_{2}$ is _____________ . [2024]

Ans.
(8)

${MnO}_{4}^{-}$    $+$    $8 H^{+}$ $+$ $5 e^{-}$    $\to$    ${Mn}^{2 +}$    $+$     $4 H_{2} O]$ $\times$ $2$

${C_{2} O}_{4}^{2 -}$ $\to$    $2 {CO}_{2}$ $+$    $2 e^{-}$    $]$ $\times$ $5$

_____________________________________________

   $2 {MnO}_{4}^{-}$ $+$    $5 C_{2} O_{4}^{2 -}$ $+$    $16 H^{+}$    $\to$ $2 {Mn}^{2 +}$    $+$    $10 {CO}_{2}$    $+$    $8 H_{2} O$

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