ch 17 key terms

5 Written Questions

1. a mixture from which some of the particles settle out slowly upon standing
2. the chaotic movement of colloidal particles, caused by collision with particles of the solvent in which they are dispersed
3. a hygroscopic substance used as a drying agent
4. scattering of light by particles in a colloid or suspension, which causes a beam of light to become visible
5. an inward force that tends to minimize the surface area of a liquid; it causes the surface to behave as if it were a thin skin

5 Matching Questions

1. nonelectrolyte
2. Aqueous solution
3. deliquescent
4. hygroscopic
5. effloresce

1. a a solution in which the solvent is water
2. b a compounds that does not conduct an electric current in aq or in the molten state
3. c a term describing salts and other compounds that remove moisture from the air
4. d to lose water of hydration; the process occurs when the hydrate has a vapor pressure higher than that of water vapor in the air
5. e a term describing a substance that removes sufficient water from the air to form a solution; the solution formed has a lower vapor pressure than that of the water in the air

5 Multiple Choice Questions

1. dissolved particles in a solution
   1. solvation
   2. colloid
   3. solvent
   4. solute
2. the colloidal dispersion of one liquid in another
   1. emulsion
   2. solvation
   3. colloid
   4. suspension
3. a solution in which only a fraction of the solute exists as ions
   1. electrolyte
   2. nonelectrolyte
   3. weak electrolyte
   4. strong electrolyte
4. the dissolving medium in a solution
   1. solvent
   2. solute
   3. solvation
   4. colloid
5. a solution in which a large portion of the solute exists as ions
   1. nonelectrolyte
   2. weak electrolyte
   3. strong electrolyte
   4. electrolyte

5 True/False Questions

1. surfactant → a surface active agent; any substance with molecules that interfere with the hydrogen bonding between water molecules. Reducing surface tension; soaps and detergents are surfactants

   True        False

2. water of hydration → water molecules that are an integral part of a crystal structure

   True        False

3. electrolyte → a compounds that does not conduct an electric current in aq or in the molten state

   True        False

4. colloid → dissolved particles in a solution

   True        False

5. solvation → a process that occurs when an ionic solution dissolves; in a solution, the ions are surrounded by solvent molecules

   True        False