Section 19.1
Acids and Bases: An Introduction
Practice Test
1.
Identify a conjugate acid-base pair in the reaction NH
3
+ H
2
O ‹–› NH
4
+
+ OH
-
a.
H
2
O and OH
-
b.
NH
3
and H
2
O
c.
NH
3
and OH
-
d.
H
2
O and NH
4
+
Hint
2.
Which of these is a product of the first step in the ionization of phosphoric acid, H
3
PO
4
?
a.
H
3
PO
4
b.
H
2
PO
4
c.
HPO
4
d.
PO
4
Hint
3.
What will a nonmetallic anhydride produce in aqueous solution?
a.
acid
b.
base
c.
salt
d.
solid precipitate
Hint
4.
A substance that contains hydrogen and produces H
+
ions in aqueous solution is a(n) ________.
a.
acid
b.
base
c.
salt
d.
water
Hint
5.
According to the BrÆnsted-Lowry theory, a base is a(n) ___________.
a.
electron pair acceptor
b.
hydrogen ion donor
c.
hydrogen ion acceptor
d.
electron pair donor
Hint
6.
Which one of the following could not be a BrÆnsted-Lowry acid?
a.
H
2
O
b.
H
3
O
+
c.
NH
4
+
d.
BF
3
Hint
7.
When HClO
4
ionizes in water, ClO
4
-
is the ______________.
a.
acid
b.
base
c.
conjugate acid
d.
conjugate base
Hint
8.
Which of the following is not a conjugate acid-base pair?
a.
H
2
O and OH
-
b.
H
3
O
+
and OH
-
c.
HCl and Cl
-
d.
HNO
3
and NO
3
-
Hint
9.
H
2
SO
4
is a ____________.
a.
monoprotic acid
b.
monoprotic base
c.
diprotic acid
d.
diprotic base
Hint
10.
Which of the following is a weak acid?
a.
HCl
b.
HNO
3
c.
HClO
4
d.
HF
Hint
11.
Which of the following is a strong base?
a.
NH
3
b.
HCO
3
-
c.
NaOH
d.
HCOOH
Hint
12.
Which of the following is the strongest base according to the Bronsted-Lowry theory?
a.
Cl
-
b.
NO
3
-
c.
F
-
d.
I
-
Hint
13.
Under what condition is the OH
-
ion concentration in water expected to be zero?
a.
in a solution of strong acid
b.
in a solution of strong base
c.
in a solution of weak base
d.
never
Hint
14.
Which of the following compounds is not a salt?
a.
K
2
SO
4
b.
BaCrO
4
c.
FeCl
2
d.
Mg(OH)
2
Hint
