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Standard XII

Chemistry

Percentage Composition

25 mLof 2N HC...

Question

25 mLof 2N HCL 50mL of 4N $H N O_{3}$ and x mL of 2M $H_{2} S O_{4}$ are mixture together and the total volume is made up to 1 L after dilution. 50mL of this acid mixture completely reacted with 25 mL of a 1N $N a_{2} C O_{3}$ solution.The value of x is?

250 mL

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62.5 mL

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100 mL

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None of these

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Solution

The correct option is B 62.5 mL
Normality of mixture= $\frac{25 \times 2 + 50 \times 4 + x \times 2 \times 2}{1000}$
= $\frac{250 + 4 x}{1000} = \frac{1}{4} + \frac{x}{250}$
$N_{1} V_{1} = N_{2} V_{2}$
$\Rightarrow (\frac{1}{4} + \frac{x}{250}) 50 = 25 \times 1$
$\Rightarrow (\frac{250 + 4 x}{1000}) 50 = 25$
$\Rightarrow 250 + 4 x = 500$
$\Rightarrow 4 x = 500 - 250 \Rightarrow x = \frac{250}{4} = 62.5 m l$ .

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25 mLof 2N HCL 50mL of 4N HNO3 and x mL of 2MH2SO4 are mixture together and the total volume is made up to 1 L after dilution. 50mL of this acid mixture completely reacted with 25 mL of a 1N Na2CO3 solution.The value of x is?

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