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17 January, 20:55

What is the mole fraction of solute in a 3.19 m aqueous solution?

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  1. 17 January, 21:52
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    Molality = mol / Kg

    if we assume that we have 1 kg of water, we have 3.19 moles of solute.

    the formula for mole fraction - - > mole fraction = mol of solule / mol of solution

    1) if we have 1 kg of water which is same as 1000 grams of water.

    2) we need to convert grams to moles using the molar mass of water

    molar mass of H₂O = (2 x 1.01) + 16.0 = 18.02 g/mol

    1000 g (1 mol / 18.02 grams) = 55.5 mol

    3) mole of solution = 55.5 moles + 3.19 moles = 58.7 moles of solution

    4) mole fraction = 3.19 / 58.7 = 0.0543
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