Solutions Review
Chemistry
Which of the following operation usually makes a
substance dissolve faster in a solvent?
A) agitation
B) raising the temperature
C) crushing the substance into a powder
D) all of the above.
Which of the following is a colligative property that
explains why ice will form at higher temperatures
in the Great Lakes than in the ocean.
a.
b.
c.
d.
e.
boiling point elevation
molarity
molality
freezing point depression
mole fraction
What is the number of moles of solute in 250 mL
of 0.4 M of solution?
A) 0.1 mol
B) 0.62 mole
C) 0.16 mol
D) 1.6 mol
E) 1 mol
Pressure has and influence on the solubility of:
A) liquids dissolving in liquids
B) solids & liquids dissolving in liquids.
C) gases dissolving in liquids.
D) solids dissolving in liquids
Colligative properties of solutions depend on:
A) size of the solute particles.
B) molecular nature of the solute particles
C) charge of the solute particles.
D) the number of solute particles
What is the maximum amount of KCl that can
dissolve in 200 g of water?
(The solubility of KCl is 34 g/100 g H2O at 20C.)
a. 17 g
b. 34 g
c.
d.
68 g
6800 g
Which of the following pairs of factors affects the
solubility of a particular substance?
a.
b.
c.
d.
particle size and degree of mixing
temperature and degree of mixing
temperature and the nature of solute and solvent
particle size and temperature
If a crystal added to an aqueous solution causes
many particles to come out of the solution, the
original solution was ____.
a. unsaturated
b. saturated
c.
an emulsion
d. supersaturated
Which of the following substances is less soluble
in hot water than in cold water?
a. CO2(g)
b. NaCl(s)
c.
d.
NaNO3(s)
KBr(s)
Which of the following occurs to most solids
as temperature increases?
a. Solubility decreases.
b. Solubility increases.
c. Solubility remains the same.
d. Molarity doubles.
In a concentrated solution there is ____.
a. no solvent
b. no solute
c. a small amount of solute
d. a large amount of solute
What is the molarity of a solution that contains 6
moles of solute in 2 liters of solution?
a. 6M
c.
7M
b. 12M
d. 3M
Which of the following operations yields the
number of moles of solute?
a. molarity x moles of solution
b. molarity x mass of solution
c. molarity x liters of solution
d. moles of solution x volume of solution
What mass of sucrose, C12H22O11, is needed to
make 500.0 mL of a 0.200M solution?
a. 34.2 g
b. 100 g
c.
d.
17.1 g
68.4 g
How many mL of a 2.0M NaBr solution are
needed to make 200.0 mL of 0.50M NaBr?
a. 25 mL
b. 50. mL
c.
d.
100 mL
150 mL
If 2.0 mL of 6.0M HCl is used to make a 500.0mL aqueous solution, what is the molarity of
the dilute solution?
a. 0.024M
b. 0.24M
c.
d.
0.30M
0.83M
If the percent mass of solute for a solution is 4%
and the mass of the solution is 200 g, what is
the mass of solute in solution?
a. 8.0 g
b. 50 g
c.
d.
80 g
800 g
Which of the following is NOT a colligative
property of a solution?
a.
b.
c.
d.
boiling point elevation
vapor pressure lowering
supersaturation
freezing point depression
What is the mole fraction of ethanol in a solution
of 3.00 moles of ethanol and 5.00 moles of
water?
a. 0.375
b. 0.6
c.
d.
1.67
15
What is the molality of a solution containing 8.0
grams of solute in 0.50 kg of solvent? (molar
mass of solute = 24 g)
a. 0.67m
b. 4.0m
c.
d.
1.7m
0.17m
What is the number of kilograms of solvent in a
0.70 molal solution containing 5.0 grams of
solute? (molar mass of solute = 30 g)
a. 0.24 kg
b. 2.4 kg
c.
d.
0.11 kg
1.1 kg
To which of the following variables is change in
boiling point directly proportional?
a.
b.
c.
d.
molarity of solution
percent by volume of solution
molality of solution
percent (mass/mass) of solution
The freezing point of a solution that contains
0.550 mol moles of NaI in 615 g of water is
____. (kf = 1.86C/m; molar mass of water = 18.0 g)
a. 1.66C
b. -1.66C
c.
d.
3.33C
-3.33C
What is the boiling point of a solution that
contains 3.00 moles of KBr in 2000. mL of
water? (kb = 0.512C/m; molar mass of water = 18.0
g)
a. 97.0C
b. 99.7C
c.
d.
101.4C
103.0C
What is the approximate molar mass of a molecular
solute if 300. g of the solute in 1000. g of water
causes the solution to have a boiling point of 101C?
(kb = 0.512C/m; kf = 1.86C/m; molar mass of water = 18.0 g)
a. 15.0 g/mol
b. 30.0 g/mol
c.
d.
150. g/mol
300. g/mol