Unit 11 Exam Review

Question 1

The portion of the solution within which the solute is dissolved/dissociated:

Answer 1

solvent

Question 2

Solute ions or molecules are surrounded by solvent molecules:

Answer 2

solvation

Question 3

Mixture in which particle size averages between 1 nm and 1000 nm:

Answer 3

colloid

Question 4

Inward force tending to minimize surface area of a liquid:

Answer 4

surface tension

Question 5

Dissolved particle:

Answer 5

solute

Question 6

Colloidal particles spread throughout a suspension:

Answer 6

dispersed phase

Question 7

Colloid of a liquid in a liquid:

Answer 7

emulsion

Question 8

A colligative property related to the fact that ice will form at higher temperatures in the Great Lakes than in the ocean:

Answer 8

freezing point depression

Question 9

A colligative property related to a decrease in the vapour pressure of a solution:

Answer 9

boiling point elevation

Question 10

Number of moles of solute dissolved in 1 kg of solvent:

Answer 10

molality

Question 11

What causes water’s low vapour pressure?:

Answer 11

hydrogen bonding

Question 12

Which of the following is NOT a result of surface tension in water?:
•surface area is maximized
•water has an unusually low vapour pressure
•surface appears to have a “skin”
•drops tend to become spherical

Answer 12

surface area is maximized

Question 13

What is the term for the dissolving medium in a solution?:

Answer 13

solvent

Question 14

Which of the following substances is the most soluble in water?:
     •sodium chloride
     •methane
     •bromine
     •carbon

Answer 14

sodium chloride

Question 15

Why are two non-polar substances able to dissolve in each other?:

Answer 15

they have similar attractive forces in their molecules

Question 16

Which of the following substances dissolves most readily in water?:
     •Hexane
     •Oil
     •NH3
     •CH4

Answer 16

NH3

Question 17

What type of compound is always an electrolyte?:

Answer 17

ionic

Question 18

Which of the following materials is NOT a colloid?:
     •glue
     •alloy
     •smoke
     •muddy water

Answer 18

alloy

Question 19

What is the size range of particles in a colloid?:

Answer 19

between 1 nm and 1000 nm

Question 20

Which of the following types of mixtures exhibit the Tyndall effect?:
     •suspensions and colloids
     •suspensions and solutions
     •colloids and solutions
     •colloids only

Answer 20

suspensions and colloids

Question 21

What causes Brownian motion in colloids?:

Answer 21

molecules of the dispersion medium colliding with dispersed phase particles

Question 22

Which of the following expressions is generally used for solubility?:
•grams of solute per 100 grams of solvent
•grams of solute per 100 millilitres of solvent
•grams of solute per 100 grams of solution
•grams of solute per 100 millilitres of solution

Answer 22

grams of solute per 100 grams of solvent

Question 23

Which of the following substances is less soluble in hot water than in cold water?:
     •CO2
     •NaCl
     •NaNO3
     •KBr

Answer 23

CO2

Question 24

Which of the following occurs as temperature increases?:
     •solubility decreases
     •solubility increases
     •solubility remains the same
     •molarity doubles

Answer 24

solubility increases

Question 25

What happens to the solubility of a gas, in a liquid, if the partial pressure of the gas above the liquid decreases?:

Answer 25

the solubility decreases