Acid/Base Chemistry Review
1. Indicate the acid/conjugate base and base/conjugate acid pairs in each of the following
reactions/equilibria:
HCl + H2O
H3O+ + Cl-
NH3 + H2O
NH4+ + OHCH3COO- + H3O+
CH3COOH + H2O
CHOO- + NH4+
HCOOH + NH3
2. Write equilibrium expressions for each of the reactions above. Assume that water is the solvent in
each case.
3. Calculate the pH of a 0.01 M solution of HCl
4. Calculate the pH of a 0.01 M solution of Ca(OH)2
5. A 0.10 M solution of acetic acid has a pH of 2.88. What is Ka for this acid?
6. A monoprotic acid HA has a Ka of 1.24 x 10-5. What would the pH of a 0.4 M solution of this acid
be?
7. Consider the following table.
H
H C H
H
Compound
a.
b.
c.
d.
H
N
H
H
H
O
H
pKa
60
36
15.7
Which compound above is the most acidic? Which s the least acidic?
Draw the structures of the conjugate base of each of these acids.
Which conjugate base is the most basic? Which is the least basic?
Calculate the value of Kb and pKb for each of these.
8. For each of the following, use the pKa table at right to find the equilibrium
constant, K, for each of these reactions. Predict whether the reaction
equilibrium will lie to the right or to the left.
CH3CO2H
HCl
NH3
+ CH3OH
+ CH3OH
+ CH3OH
CH3CO2-
+ CH3OH2+
Cl- + CH3OH2+
NH4+
+ CH3O-
H
F
3.1
Compound
CH3COOH
CH3OH
CH3OH2+
HCl
NH3
NH4+
pKa
4.76
15.54
-2.2
-8.0
4.7
9.2