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    Composition by mass of NaNO3 mixed with Mg(NO3)2

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    A solid consists of a mixture of NaNO3 and Mg(NO3)2. When 6.75 g of the solid is dissolved in 50.0 g water, the freezing point is lowered by 5.35°C. What is the composition, by mass, of the solid?
    Mg(NO3)2
    g
    NaNO3
    g

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    https://brainmass.com/chemistry/stoichiometry/composition-mass-nano3-mixed-mg-286852

    Solution Preview

    van't hoff factor for NaNO3, i = 2 2 ions for every formula unit dissociated
    van't hoff factor for Mg(NO3)2, i = 3 3 ions for every formula unit dissociated

    Kf of water = 1.86 C/m
    molar mass : NaNO3 = 85 g/mol
    Mg(NO3)2 = 148 g/mol

    mass of water = 50 g
    mass of NaNO3 + Mg(NO3)2 = 6.75 ...

    Solution Summary

    The expert examines composition by mass of NaNO3 mixed with Mg(NO3)2.

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