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3 May, 13:21

The density of an aqueous solution of nitric acid is 1.36 g/ml and the concentration is 2.48 m. what is the concentration of this solution in percent by mass?

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  1. 3 May, 13:27
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    Density is mass by volume

    1 mL of nitric acid solution has a mass of 1.36 g

    therefore 1000 mL has a mass of 1360 g

    the molarity of solution is 2.48 mol/L

    1 L of solution has 2.48 mol

    the mass of 2.48 mol of HNO₃ is - 2.48 mol x 63 g/mol = 156.24 g

    this means that 156.24 g of the solution consists of nitric acid

    therefore percentage by mass - mass of nitric acid / total mass x 100%

    concentration as percentage by mass = 156.24 g / 1360 g x 100%

    percentage = 11.5%
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