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Chapter 2 109
Copyright © 2017 Pearson Education, Inc.
Chapter 2 Practice Test
1.
Which compound is the stronger acid?
a.
CH
3
CHCH
2
OH or CH
3
CHCH
2
OH
Cl
F
b.
HBr or HI
c.
Cl
Cl
CH
3
CCH
2
OH or
Cl
Cl
CH
2
CHCH
2
OH
d.
CH
4
or NH
3
2.
Which compound is the stronger base?
a.
CH
3
CH
2
NH
2
or CH
3
CH
2
OH
b.
F
-
or I
-
3.
Draw a circle around the strongest base and draw a square around the weakest base.
CH
3
CO
−
CH
3
O
−
−
CH
3
NH CH
3
NH
2
CH
3
OH
O
4.
The following compounds are drawn in their acidic forms, and their
p
K
a
values are given.
Draw the form in which each compound will predominantly exist at
pH
=
8.
+
3
3 2
3
3 2 3
+
a
a
a
a
H
CH COOH CH CH OH CH OH
CH CH NH
p 4.8
p 15.9
p
2.5
p 11.2
K
K
K
K
=
=
= −
=
5.
a.
Write the acid–base reaction that occurs when methylamine is added to water.
b.
Does the above reaction favor reactants or products?
6.
a.
What is the conjugate base of
NH
3
?
b.
What is its conjugate acid?
7.
What is the
p
K
a
of a compound that at
pH
=
7.2
has a 10 times greater concentration in its basic form than
in its acidic form?
8.
a.
What products are formed from the following reaction?
+
3
4
CH OH + NH
b.
Does the reaction favor reactants or products?
9.
A compound has a
K
a
=
6.3
*
10
-
9
.
What is its approximate
p
K
a
(that is, between what two integers)?