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Gay Lussac's Law, Avagadro's Law

A 5.0 mL so...

Question

A $5.0$ mL solution of $H_{2} O_{2}$ liberates $0.508$ g of iodine from an acidified $K I$ solution. The strength of $H_{2} O_{2}$ solution in terms of volume strength at $S T P$ will be :

A

2.24 V

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B

4.48 V

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C

8.96 V

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D

none of the above

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Solution

The correct option is B $4.48 V$
Milliequivalents of $I_{2} = \frac{0.508}{127} \times 1000$

Milliequivalents of $K I = \frac{0.508}{127} \times 1000$

Milliequivalents of $H_{2} O_{2} = \frac{0.508}{127} \times 1000$

Normality of $H_{2} O_{2} = \frac{0.508}{127} \times \frac{1000}{5}$

For $H_{2} O_{2}$ , $5.6 \times$ Normality $=$ Volume strength

$∴$ Volume strength $= \frac{0.508}{127} \times \frac{1000}{5} \times 5.6 = 4.48 V$

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