Calculate the concentration of nitric acid in moles per litre in a sample which has a density $1.41 g {m L}^{- 1}$ and the mass per cent of nitric acid in it being $69 %$ .

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Solution

The density of the solution is 1.41 g/mL.

1000 g of the solution will have a volume $= \frac{Mass}{Density} = \frac{1000}{1.41} = 709$ ml.

The mass per cent of nitric acid is $69 %$ .

1000 g of the solution will have $1000 \times \frac{69}{100} = 690$ g of nitric acid.

The molarity of solution is $\frac{Mass of nitric acid}{Molar mass of nitric acid \times Volume of solution} = \frac{690}{63 \times 709} = 0.0155$ M.

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Calculate the concentration of nitric acid in moles per litre in a sample which has a density 1.41gmL−1 and the mass per cent of nitric acid in it being 69%.

Calculate the concentration of nitric acid in moles per litre in a sample which has a density $1.41 g {m L}^{- 1}$ and the mass per cent of nitric acid in it being $69 %$ .