Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is ______. Given: Density of nitric acid solution is 1.25 g/mL. [2025]

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Solution

Q.
Concentrated nitric acid is labelled as 75% by mass. The volume in mL of the solution which contains 30 g of nitric acid is ______.

Given: Density of nitric acid solution is 1.25 g/mL. [2025]

1 45

2 55

3 32

4 40

Ans.
(3)

$\frac{% w}{w} = \frac{w_{solute}}{w_{solution}} \times 100$

$75 = \frac{30}{w_{solution}} \times 100$

$w_{solution} = 40 g$

$V_{solution} = \frac{w_{solution}}{d_{solution}} = \frac{40 g}{1.25 {g mL}^{- 1}} = 32$ $mL$

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