Calculate the concentration of nitric acid in moles per litre in a sample that has a density, 1.41 g mL–1

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Asked: 2023-03-09T11:27:45+05:30 In: Chemistry
Calculate the concentration of nitric acid in moles per litre in a sample that has a density, 1.41 g mL–1

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Calculate the concentration of nitric acid in moles per litre in a sample that has a density, 1.41 g mL–1, and the mass percent of nitric acid in it being 69%.

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    Mass percent of 69% means tat 100g of nitric acid solution contain 69 g of nitric acid by mass.

    Molar mass of nitric acid (HNO3) = 1+14+48 = 63g mol-1

    Number of moles in 69 g of HNO3 = 69/63 moles = 1.095 moles

    Volume of 100g nitric acid solution = 100/1.41 mL = 70.92 mL = 0.07092 L

    ∴ Conc. of HNO3 in moles per litre = 1.095/0.07092 = 15.44 M.

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