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4 November, 15:39

Calculate the mass percent (m/m) of a solution prepared by dissolving 45.09 g of NaCl in 174.9 g of H2O.

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  1. 4 November, 19:26
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    20.3 % NaCl

    Explanation:

    Given dа ta:

    Mass of solute = 45.09 g

    Mass of solvent = 174.9 g

    Mass percent of solution = ?

    Solution:

    Mass of solution = 45.09 g + 174.9 g

    Mass of solution = 220 g

    The solute in 220 g is 45.09 g

    220 g = 2.22 * 45.09

    In 100 g solution amount of solute:

    45.09 g/2.22 = 20.3 g

    Thus m/m% = 20.3 % NaCl
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