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Types of Redox Reactions

HNO3 used as ...

Question

$H N O_{3}$ used as a reagent has specific gravity of $1.42$ g/mL and contains $70$ % by strength $H N O_{3}$ .
Calculate the normality of acid.

15.78

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10

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20

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None of the above

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Solution

The correct option is D $15.78$
Molecular weight $=$ Equivalent weight of $H N O_{3} = 1 + 14 + 16 \times 3 = 63$ g

$Normality = \frac{Percentage by weight \times 10 \times d}{Ew} = \frac{70 \times 10 \times 1.42}{63} = 15.78 N$

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