Chapter 15

5 Written Questions

1. A type of heterogeneous mixture whose particles settle out over time and can be separated from the mixture by filtration.
2. A physical property of a solution that depends on the number, but not the identity, of the dissolved solute particles.
3. The ratio of the number of moles of solute dissolved in one kilogram of solvent.
4. Describes two liquids that are soluble in each other.
5. Contains more dissolved solute than a saturated solution at the same temperature.

5 Matching Questions

1. boiling point elevation
2. molarity
3. immiscible
4. Brownian motion
5. mole fraction

1. a Describes two liquids that can be mixed together but separate shortly after you cease mixing them.
2. b The jerky, random, rapid movements of colloid particles that results from collisions of particles of the dispersion medium with the dispersed medium.
3. c The number of moles of solute dissolved per liter of solution.
4. d The temperature difference between a solution's boiling point and a pure solvent's boiling point.
5. e The ratio of the number of moles of solute in solution to the total number of moles of solute and solvent.

5 Multiple Choice Questions

1. Describes a substance that cannot be dissolved in a given solvent.
   1. miscible
   2. solubility
   3. insoluble
   4. soluble
2. The additional pressure needed to reverse osmosis.
   1. osmosis
   2. suspension
   3. osmotic pressure
   4. mole fraction
3. The lowering of vapor pressure of a solvent by the addition of a nonvolatile solute to the solvent.
   1. concentration
   2. vapor pressure lowering
   3. osmotic pressure
   4. saturated solution
4. A quantitative measure of the amount of solute in a given amount of solvent or solution.
   1. Brownian motion
   2. concentration
   3. mole fraction
   4. solvation
5. States that at a given temperature, the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid.
   1. insoluble
   2. Henry's law
   3. soluble
   4. heat of solution

5 True/False Questions

1. colloid → The number of moles of solute dissolved per liter of solution.

   True        False

2. solvation → The ratio of the number of moles of solute dissolved in one kilogram of solvent.

   True        False

3. solubility → The maximum amount of solute that will dissolve in a given amount of solvent at a specific temperature and pressure.

   True        False

4. saturated solution → Contains less dissolved solute for a given temperature and pressure than a saturated solution; has further capacity to hold more solute.

   True        False

5. Tyndall effect → Describes a substance that cannot be dissolved in a given solvent.

   True        False