In this worksheet, we will practice describing colligative properties, which depend on the number of dissolved particles rather than their identity.
Q1:
Which of the following aqueous solutions has the lowest freezing point?
- A
- B
- C
- D
- E
Q2:
Meat can be classified as fresh (not frozen) even if it is stored at . Why would meat, despite being mostly water, not freeze at this temperature?
- AThe water molecules are separated from each other in meat, and so cannot combine to form a solid.
- BWater trapped inside cells is too strongly compressed to freeze at this temperature.
- CA supercooled solution is formed, as proteins in the meat inhibit the nucleation of ice crystals.
- DIons and other solutes in the water lower the freezing point.
- EThere is insufficient space in the cells of the meat for water to expand when freezing takes place.
Q3:
A solution of potassium nitrate, an electrolyte, and a solution of glycerin , a non-electrolyte, both boil at . Which of the following statements is not true?
- AThe solutions have the same freezing-point depression.
- BThe solutions are both homogeneous.
- CThe solutions have the same osmotic pressure.
- DThe solutions have the same electrical conductivity.
- EThe solutions have the same reduction in vapor pressure relative to pure water.