Solutions
Practice Test
1.
The _________ symbol separates the reactants from the products and means to yield.
a.
+
b.
→
c.
g
d.
s
2.
According to the phase diagram for CO
2
, what is the critical point for carbon dioxide?
SC.A.1.4.3
a.
31
b.
-45
c.
-100
d.
-78
3.
Which of the following molecules can form hydrogen bonds?
SC.A.1.4.1
a.
BaH
3
b.
NaH
3
c.
CH
3
d.
NH
3
4.
The chemical equation 2H
2
+O
2
→ 2H
2
O represents a __________.
a.
double-replacement reaction
b.
decomposition reaction
c.
single-replacement reaction
d.
synthesis reaction
5.
Which of the following observations could be an indication of a chemical reaction of antimony?
SC.A.1.4.3
a.
It melts at 631°C.
b.
It is a solid at room temperature.
c.
It expands upon freezing.
d.
It burns in an atmosphere of chlorine.
6.
Which of the following components will always be produced during a chemical reaction between an acid and a base?
SC.B.1.4.2
a.
a gas
b.
a base
c.
an acid
d.
water
7.
A suspension is _________.
SC.A.2.4.6
a.
a heterogeneous mixture
b.
impossible to prepare
c.
a solution
d.
a homogeneous mixture
8.
What is the percent by mass of NaCl in a solution that contains 17.5 g NaCl per 500.0 g of water?
SC.B.1.4.2
a.
3.50%
b.
14.80%
c.
3.61%
d.
3.38%
9.
In a solution, the substance that does the dissolving is ____________.
a.
the solvent
b.
the solute
c.
saturated
d.
miscible
10.
The phase change that describes the direct conversion of a solid into a gas is _______.
a.
sublimation
b.
vaporization
c.
deposition
d.
melting
11.
Which of the following is the general definition of a liquid?
a.
Matter that has neither a fixed volume nor a fixed shape.
b.
Matter that has a fixed volume but no fixed shape.
c.
Matter that has a fixed shape but no fixed volume.
d.
Matter that has a fixed volume and a fixed shape.
12.
Which one of the following is an example of an emulsion?
a.
fog
b.
mayonnaise
c.
shaving cream
d.
styrofoam
13.
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.
99.626°C
b.
100.42°C
c.
100.73°C
d.
101.64°C
14.
What is the mole fraction of ethanol
C
2
H
5
OH
in a solution of 47.5 g of ethanol in 850 g of water?
a.
0.021
b.
0.032
c.
0.98
d.
0.18
15.
The boiling points of the halogens increase in the order F
2
< Cl
2
< Br
2
< I
2
due to an increase in ____________.
SC.A.2.4.6
a.
ionic interactions
b.
permanent dipoles
c.
dispersion forces
d.
hydrogen bonding
16.
What is the complete ionic equation for the following chemical equation?
Cl
2
aq
+Na
2
SO
4
aq
→BaSO
4
s
+2NaCl
aq
a.
Ba
2+
aq
+ 2Cl
-
aq
+ 2Na
+
aq
+ SO
4
2-
aq
→ 2Na
+
aq
+ 2Cl
-
aq
+ BaSO
4
s
b.
Ba
2+
aq
+ Cl
-
aq
+ Na+
aq
+ SO
4
2-
aq
→ Na+
aq
+ Cl
-
aq
+ BaSO
4
s
c.
Ba
2+
aq
+ SO
4
2-
aq
→ BaSO
4
s
d.
BaCl
2
aq
+ 2Na
+
aq
+ SO4
2-
aq
→ 2Na
+
aq
+ 2Cl
-
aq
+ BaSO
4
s
17.
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.
39.7 g/mol
c.
62.0 g/mol
d.
58.4 g/mol
18.
Which of the following solids is a metallic solid?
a.
graphite
b.
sulfur
c.
nickel
d.
iodine
19.
Which of the following single-replacement reactions will occur?
a.
Cl
2
g
+ HBr
aq
→
b.
Cu
s
+ ZnCl
2
aq
→
c.
Br
2
g
+ HF
aq
→
d.
Au
s
+ Cu
NO
3
2
aq
→
20.
The process of a solvent and a solute completely mixing and forming a solution is ________.
a.
solvation
b.
salvation
c.
crystallization
d.
ionization
