Section 15.3
Colligative Properties of Solutions
Practice Test
1.
What is the name for a substance that dissolves in water but does not form ions or conduct an electric current?
a.
electrolyte
b.
nonelectrolyte
c.
saturated
d.
insoluble
Hint
2.
Calculate the freezing point of a solution that contains 8.0 g of sucrose
C
12
H
22
O
11
in 100 g of H
2
O. K
f
for H
2
O = 1.86°C/
m
SC.A.1.4.3
a.
-0.44°C
b.
-0.044°C
c.
-0.39°C
d.
-0.22°C
Hint
3.
Which of the following is not a colligative property?
a.
freezing point depression
b.
increasing solubility
c.
vapor pressure lowering
d.
boiling point elevation
Hint
4.
If 4.27 g sucrose
C
12
H
22
O
11
are dissolved in 15.2 g water, what is the boiling point of the resulting solution? K
b
for water = 0.512°C/
m
.
SC.A.1.4.3
a.
100.42°C
b.
100.73°C
c.
99.626°C
d.
101.64°C
Hint
5.
A 4.305-g sample of a nonelectrolyte is dissolved in 105 g of water. The solution freezes at -1.23°C. Calculate the molar mass of the solute. K
f
for water = 1.86°C/
m
.
SC.A.1.4.3
a.
46.2 g/mol
b.
58.4 g/mol
c.
39.7 g/mol
d.
62.0 g/mol
Hint
