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    Concentrations of Solutions Molarity and Molality

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    Part A
    A solution contains 0.173g of glycerol, C3H8O3, and 20.0 g of water.
    The density of water is 1.00g/mL
    What are the Molarity, Molality and % m / m concentrations of the solution?

    Part B
    What are the boiling and freezing points of the solution that has a molality of
    0.062?

    © BrainMass Inc. brainmass.com October 10, 2019, 2:50 am ad1c9bdddf
    https://brainmass.com/chemistry/stoichiometry/concentrations-solutions-molarity-molality-396012

    Solution Preview

    Part A
    A solution contains 0.173g of glycerol, C3H8O3, and 20.0 g of water.
    The density of water is 1.00g/mL
    What are the Molarity, Molality and % m / m concentrations of the solution?

    Molarity = M = mole solute /liter solution

    Mole glycerol = 0.173 g C3H8O3 (1 mol C3H8O3 / 92 g)
    Mole glycerol = 1.88 x 10-3 mol C3H8O3

    Volume of water = 20 g H2O (1 mL / 1 g) = 20 mL = 0.02 L

    (Note: Since the amount of solute (glycerol) is very small, it can be assumed ...

    Solution Summary

    The expert determines what is the molarity, molality and concentrations of the solution is determined.

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