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25 July, 14:58

What is the mole fraction of solute in a 3.63 m aqueous solution? - g?

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  1. 25 July, 15:29
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    3.63 m (molal) aqueous solution means that 3.63 moles of particular solute is dissolved in 1 Kg (1000 g) of water (solvent).

    So,

    The concentration of Solute = 3.63 moles

    Moles of water are calculated by using following formula,

    Moles = mass / M. mass

    mass of water = 1000g

    M. mass of water = 18.01 g/mol

    Putting the values,

    Moles = 1000 g / 18.01 g/mol

    Moles = 55.524 mol

    Now, having both, moles of solute and moles of solvent we can calculate mole fraction by applying following formula,

    Mole Fraction = Moles of Solute : (moles of solute + moles of solvent)

    Putting values,

    Mole Fraction = 3.63 mol : (3.63 mol + 55.524 mol)

    Mole Fraction = 3.63 mol : 59.154 mol

    Mole Fraction = 0.0614
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