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Types of Redox Reactions

KMnO4 reacts ...

Question

$K M n O_{4}$ reacts with oxalic acid according to the equation
$2 M n O_{4}^{-} + 5 C_{2} O_{4}^{2 -} + 16 H^{+} \to 2 M n^{2 +} + 10 C O_{2} + 8 H_{2} O$
Here , $20 m L$ of 0.1 M $K M n O_{4}$ is equivalent to:

120 m L

of 0.25 M

H_{2} C_{2} O_{4}

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50 m L

of 0.10 M

H_{2} C_{2} O_{4}

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25 m L

of 0.20 M

H_{2} C_{2} O_{4}

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50 m L

of 0.20M

H_{2} C_{2} O_{4}

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Solution

The correct options are
B $50 m L$ of 0.10 M $H_{2} C_{2} O_{4}$
C $25 m L$ of 0.20 M $H_{2} C_{2} O_{4}$
${2 M n O}_{4}^{-} + 5 C_{2} O_{4}^{2 -} + 16 H^{+} ⟶ 2 {M n}^{2 +} + 10 {C O}_{2} + 8 H_{2} O$
$20$ ml of $0.1$ M ${K M n O}_{4}$ contains $0.1 \times 0.020$ moles of ${K M n O}_{4}$ i.e, $0.002$ moles of ${K M n O}_{4}$
$(A)$ $120$ mL of $0.25$ M $H_{2} C_{2} O_{4}$ contains $0.25 \times 0.12$ moles of $H_{2} C_{2} O_{4}$ i.e, $0.03$ moles of $H_{2} C_{2} O_{4}$
$(B)$ $50$ mL of $0.10$ M $H_{2} C_{2} O_{4}$ contains $0.05 \times 0.1$ moles of $H_{2} C_{2} O_{4}$ i.e, $0.005$ moles of $H_{2} C_{2} O_{4}$
$(C)$ $25$ mL of $0.20$ M $H_{2} C_{2} O_{4}$ contains $0.005$ moles of $H_{2} C_{2} O_{4}$
$(D)$ $50$ mL of $0.20$ M $H_{2} C_{2} O_{4}$ contains $0.01$ moles of $H_{2} C_{2} O_{4}$
By stiochimetry, $2$ moles of ${K M n O}_{4}$ is equivalent to $5$ moles of $H_{2} C_{2} O_{4}$
Therefore, $0.002$ moles of ${K M n O}_{4}$ is equivalent to $0.005$ moles of $H_{2} C_{2} O_{4}$ .
Therefore, $(B)$ and $(C)$ are correct options.

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Similar questions

K M n O_{4}

2 M n O_{4}^{-} + 5 C_{2} O_{4}^{2 -} + 16 H^{+} ⟶ 2 M n^{2 +} + 10 C O_{2} + 8 H_{2} O

K M n O_{4}

K M n O_{4}

2 M n O_{4}^{-} + 5 C_{2} O_{4}^{2 -} + 16 H^{+} \to 2 M n^{2 +} + 10 C O_{2} + 8 H_{2} O

K M n O_{4}

K M n O_{4}

2 M n O_{4}^{-} + 5 C_{2} O_{4}^{2 -} + 16 H^{+} \to 2 M n^{2 +} + 10 C O_{2} + 8 H_{2} O

K M n O_{4}

M n O_{4}^{-}

2 M n O_{4}^{-} + 5 C_{2} O_{4}^{2 -} + 16 H^{+} \to 2 M n^{2 +} + 10 C O_{2} + 8 H_{2} O

20 m L

0.1 M M n O_{4}^{-}

H_{2} C_{2} O_{4}

5 H_{2} C_{2} O_{4} (a q) + 2 M n O_{4}^{-} (a q) ⇌ 2 M n^{2 +} (a q) + 10 C O_{2} (g) + 8 H_{2} O (l)

0.0162

K M n O_{4}

25.0

0.022

H_{2} C_{2} O_{4}

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