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Depression in Freezing Point

100ml of 0.3M...

Question

100ml of 0.3M sulphuric acid and 200 ml of 0.3M hydrochloric acid were mixed together. The normality of the resulting solution is:

0.4 N

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0.3 N

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0.1 N

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0.15 N

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Solution

The correct option is A $0.4 N$
$N = \frac{N_{1} V_{1} + N_{2} V_{2}}{V_{1} + V_{2}}$

$= \frac{(0 \cdot 3 \times 2) 100 + (0 \cdot 3 \times 1) 200}{100 + 200}$

$= \frac{60 + 60}{300}$

$= \frac{120}{300}$

$= 0 \cdot 4 N$

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