Worksheet: Colligative Properties

In this worksheet, we will practice describing colligative properties, which depend on the number of dissolved particles rather than their identity.


Which of the following aqueous solutions has the lowest freezing point?

  • A0.080mol/kgNaPO34
  • B0.12mol/kgNaCl
  • C0.15mol/kgCaCl2
  • D0.010mol/kgCO2
  • E0.10mol/kgCHOH25


Meat can be classified as fresh (not frozen) even if it is stored at 1C. Why would meat, despite being mostly water, not freeze at this temperature?

  • AA supercooled solution is formed, as proteins in the meat inhibit the nucleation of ice crystals.
  • BThere is insufficient space in the cells of the meat for water to expand when freezing takes place.
  • CThe water molecules are separated from each other in meat and thus cannot combine to form a solid.
  • DIons and other solutes in the water lower the freezing point.
  • EWater trapped inside cells is too strongly compressed to freeze at this temperature.


A solution of potassium nitrate, an electrolyte, and a solution of glycerin (CH(OH))353, a nonelectrolyte, both boil at 100.3C. Which of the following statements is not true?

  • AThe solutions have the same osmotic pressure.
  • BThe solutions are both homogeneous.
  • CThe solutions have the same freezing-point depression.
  • DThe solutions have the same electrical conductivity.
  • EThe solutions have the same reduction in vapor pressure relative to pure water.

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