Acids and Bases
Practice Test
1.
The acid ionization constant,
K
a
, is __________ for __________ acids.
a.
smallest, strong
b.
largest, weak
c.
smallest, weak
d.
largest, anhydride
2.
Calculate the pH of a solution that has a [OH
-
] = 2.50 x 10
-4
M
.
a.
-3.6
b.
3.6
c.
10.4
d.
0.4
3.
Which of the following salts will produce a basic solution?
a.
Ca(NO
3
)
2
b.
NaCl
c.
KBr
d.
KCN
4.
When a solution has a pH of 4, what is the pOH of that solution?
a.
10
b.
7
c.
18
d.
4
5.
What is the concentration of hydrogen ions in a solution that has a pH of 4.32?
a.
8.6 x 10
-5
M
b.
6.2 x 10
-4
M
c.
5.1 x 10
-4
M
d.
4.8 x 10
-5
M
6.
A solution of pH = 2.1 would be described as __________.
a.
slightly acidic
b.
slightly basic
c.
distinctly acidic
d.
distinctly basic
7.
When HClO
4
ionizes in water, ClO
4
-
is the ______________.
a.
base
b.
conjugate base
c.
conjugate acid
d.
acid
8.
Calculate the H
+
ion and OH
-
ion concentrations in a 0.50
M
solution of HBr.
a.
[H
+
] = 0.50
M
and [OH
-
] = 0.50
M
b.
[H
+
] = 0.50
M
and [OH
-
] = 2.0
M
c.
[H
+
] = 1.0 ´ 10
-7
M
and [OH
-
] = 1.0 ´ 10
-7
M
d.
[H
+
] = 0.50
M
and [OH
-
] = 2.0 ´ 10
-14
M
9.
What is the net ionic equation for the neutralization reaction between HF and KOH?
a.
H
+
+ OH
-
→ H
2
O
b.
K
+
+ F
-
→ KF
c.
H
+
+ KOH → H
2
O + K
+
d.
HF + OH
-
→ H
2
O + F
-
10.
Which of these is a product of the first step in the ionization of phosphoric acid, H
3
PO
4
?
a.
HPO
4
b.
PO
4
c.
H
2
PO
4
d.
H
3
PO
4
11.
Which of the following is not a conjugate acid-base pair?
a.
HNO
3
and NO
3
-
b.
H
3
O
+
and OH
-
c.
HCl and Cl
-
d.
H
2
O and OH
-
12.
Which of the following is a weak acid?
a.
HF
b.
HClO
4
c.
HCl
d.
HNO
3
13.
Neutralization is the chemical process in which ____________.
a.
hydrogen ions react with hydroxide ions to form water
b.
sodium ions react with chloride ions to form sodium chloride
c.
sodium ions react with hydroxide ions to form sodium hydroxide
d.
hydrogen ions react with chloride ions to form hydrogen chloride
14.
Compared to strong acids, weak acids produce __________ ions and conduct electricity __________ efficiently.
a.
more, more
b.
fewer, more
c.
fewer, less
d.
more, less
15.
A 0.001
M
solution of HCl is ____________.
a.
neutral
b.
a concentrated acid solution
c.
a weak acid solution
d.
a dilute acid solution
16.
Which of the following cannot be a buffer?
a.
a mixture of a weak acid and a strong base
b.
a mixture of a strong acid and a strong base
c.
a mixture of a strong acid and a weak base
d.
a mixture of a weak acid and a weak base
17.
Which of the following compounds is not a salt?
a.
K
2
SO
4
b.
Mg(OH)
2
c.
BaCrO
4
d.
FeCl
2
18.
pH is defined as __________.
a.
log [H
+
]
b.
log [OH
-
]
c.
-log [OH
-
]
d.
-log [H
+
]
