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28 February, 19:00

What is the mole fraction of solute in a 3.84 m aqueous solution?

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  1. 28 February, 19:08
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    Answer is: mole fraction of solute is 0,065.

    molality (aqueous solution) = 3,84 mol/kg.

    Molality i s a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent.

    n (solute) = 3,84 mol.

    m (solvent-water) = 1 kg = 1000 g.

    n (water) = 1000 g : 18 g/mol = 55,55 mol.

    mole fraction = 3,84 mol : 3,84 mol + 55,55 mol.

    mole fraction = 0,065 = 6,5%.
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