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March 29, 2017

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the following questions are about colligative properties:

a)How much would the freezing point change in a 2.5 solution of phenol in benzene?

b)how much would the boiling point change in a 1.m solution of magnesium chloride in ethanol?

c)Does adding sugar to water raise or lower the vapor pressure of water? why?

  • Chemistry - ,

    a) delta T = Kf*m
    b) delta T = *Kb*m
    c) The vapor pressure is ALWAYS less (for ideal solution) when a non-volatile solute is added to a volatile solvent. Why? Think about the sugar molecules getting in the way of the water molecules and they (the water molecules) can't escape as easily.

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