Practice Problems on Acid-‐Base Chemistry

Practice Problems on Acid-‐Base Chemistry -‐ Answers 1. For each of the following acid base reactions place one of the arrows inside the box to designate the extent of the reaction. product favored
neither side favored
a)
b)
+
HNO3
pKa = -1.3
NH3
NO3-
+
HNO2
pKa = 3.29
HSO4-
NO2-
+
reactant favored
NH4
pKa = 9.24
H2SO 4
pKa ≅ -3.0
+
O
c)
HSO3Cl
+
H2
C
Cl
C
O
-SO
O
3Cl
H2
C
+ Cl
pKa ≅ -3.1
C
pKa = 2.86
H
O
d)
H 3C
O
C
CH3
+
ClH 3C
C
CH3
O
e)
+
H 3C
C
CH3
f)
HS
+
H 3C
H3O+
pKa = -1.74
C
+
H2S
pKa = 7.0
g)
HCN
pKa = 9.3
+
H2O
HCl
CN-
NH3
+
pKa = 38
CH 2
H2O
+ H3O+
pKa = -1.74
pKa = -7.0
O
NH2
pKa = 26.5
+
pKa = -2.9
OH
2. Draw the structures of the conjugate acid and conjugate base that result from each acid base reaction. a)
SO 3Cl-
+
HSO3Cl
+
NH 3
NH 2
b)
I-
+
HI
+
N
N
H
c) H 2N
H 3N
OH
+
O
NH 2
H
N
e)
HCl
(1 equivalent)
+
H 3N
NH 2
H
N
NH 2
H 3C
+
HSO3Cl
NH 2
H 3C
N
+
N
HCl
N
N
H
H
H
+
Cl-
SO 3Cl-
NH 2
f)
+
+
NH
Cl-
+
O
d)
H 2N
OH
HCl
(1 equivalent)
Cl-
3. Draw the structures of the conjugate acid and conjugate base that result from each acid base reaction. O
a)
O
O
OCH3
+
O
HOCH3
+
OH
b)
O
OH
+
HO
O
O
c)
HO
+
OH
HO
OH
H2O
O
d)
e)
H 2N
Li
f)
+
H2O
+
OH
+
OH
O
NH3
+
OH
NaH
O
NH2
Li
O
+
OH
+
O
O
H 2N
H2O
+
HO
Na
+
OH
H2
O
h)
OH
+ HCO3
O
+ CO2 + H2O
Prepared by José Laboy

Download Report