chapter 12 study guide

Question 1

molecules whose water solutions can carry electric current

Answer 1

ionize in water

Question 2

what increases the rate at which a solid dissolves in water

Answer 2

raising the temperature of the water
stirring the solution
crushing the solid

Question 3

when the energy released by the formation of solvent-solute attractions is greater than the energy absorbed by overcoming solute-solute and solvent-solvent attractions, the dissolving process

Answer 3

has a negative enthalpy of solution

Question 4

henry’s law relates

Answer 4

pressure to gas-liquid solubility

Question 5

raising the temperature of a solvent causes solvent-solvent collisions to become

Answer 5

more frequent and more energetic

Question 6

the rate at which a solid dissolves is

Answer 6

directly related to solubility

Question 7

effervescence is the

Answer 7

escape of a gas from a gas-liquid solution

Question 8

a solution that contains a large concentration of solute but can hold even more solute is

Answer 8

unsaturated and concentrated

Question 9

what type of solute-solvent combination is carbon dioxide in water

Answer 9

gas-liquid

Question 10

which type of mixture contains the smallest particles

Answer 10

solutions

Question 11

in a solution at equilibrium,

Answer 11

the rate of dissolution and the rate of crystallization are equal

Question 12

a dissolved solute that does not form ions is

Answer 12

a nonelectrolyte

Question 13

as temperature increases, the solubility of gases in liquids generally

Answer 13

decreases

Question 14

the substance dissolved in a homogeneous mixture is the

Answer 14

solute

Question 15

a mixture that can be identified because it scatters light is a

Answer 15

colloid

Question 16

when a solute dissolves and recrystallizes at the same rate, the solution is at

Answer 16

equillibrium

Question 17

a substance that does not dissolve in a polar solvent is probably

Answer 17

nonpolar

Question 18

to carry a electric current, a solution must contain

Answer 18

ions

Question 19

a solution that contains more dissolved solute than a saturated solution contains under the same conditions is called a

Answer 19

supersaturated solution

Question 20

mixtures are classified according to their

Answer 20

particles size in diameter

Question 21

a homogeneous mixture that contains particles in a dispersed phase that do not settle out is a

Answer 21

colloid

Question 22

the dissolved substance in a solution is called the

Answer 22

solute

Question 23

an _______ is a solution whose solute and solvent are both solid metals

Answer 23

alloy

Question 24

___________ is an example of an electrolyte and _________ is an example of an nonelectrolyte

Answer 24

sodium chloride

sugar

Question 25

_____ is an example of a colloid

Answer 25

fog

Question 26

brass is an alloy made up of _____ and ______

Answer 26

zinc and copper