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Hydrogen Peroxide

What is volum...

Question

What is volume strength of $H_{2} O_{2}$ solution, whose 40 ml requires 20 ml of 0.2 M acidified $K M n O_{4}$ solution for complete reaction?

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Solution

For complete reaction we have,
gm eq of $H_{2} O_{2}$ = gm eq of $K M n O_{4}$
$40 \times M \times 2 = 0.2 \times 5 \times 20$
$\Rightarrow M = 0.25 M$ (M is molarity of $H_{2} O_{2}$ solution)
So, volume strength of $H_{2} O_{2}$ solution $= 11.2 \times 0.25 = 2.8$

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