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Balancing Redox Equations

H 2 O 2 oxidi...

Question

$H_{2} O_{2}$ oxidises $M n O_{2}$ to $M n O_{4}^{-}$ in basic medium. $H_{2} O_{2}$ and $M n O_{2}$ react in the molar ratio of $x : y$ . What is the value of $x + y$ ?

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Solution

$3 H_{2} O_{2} + 2 M n O_{2} ⟶ M n O_{4}^{-} + 6 H_{2} O$
Thus,
$H_{2} O_{2} : M n O_{2} = 3 : 2$
So, $x + y = 3 + 2 = 5$

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