Calculate the pH to the nearest 0.01 unit of a solution which is 0.015
M
in NH
3
and 0.10
M
in
NH
4
Cl. The K
b
for NH
3
is 1.8 x 10
-5
. Write the Brønsted-Lowery reaction and the equilibrium
expression.
Ans = 8.43
Calculate the pH to the nearest 0.01 unit of a solution which is 0.025
M
in CH
3
NH
2
and 0.15
M
in
CH
3
NH
3
Cl. The K
b
for CH
3
NH
2
is 2.29 x 10
-11
. Write the Brønsted-Lowery reaction and the
equilibrium expression.
Ans = 2.58
Calculate the pH to the nearest 0.01 unit of a solution which is 0.050
M
in (CH
3
)
3
N and 0.10
M
in
(CH
3
)
3
NHCl. The K
b
for (CH
3
)
3
N is 1.59 x 10
-10
. Write the Brønsted-Lowery reaction and the
equilibrium expression.
Ans = 3.90
Calculate the pH to the nearest 0.01 unit of a solution which is 0.35
M
in HONH
2
and 0.025
M
in
HONH
3
Cl. The K
b
for HONH
2
is 3.2 x 10
-7
. Write the Brønsted-Lowery reaction and the
equilibrium expression.
Ans = 8.65
Calculate the pH to the nearest 0.01 unit of a solution which is 0.0025
M
in C
6
H
5
NH
2
and
0.035
M
in C
6
H
5
NH
3
Cl. The K
b
for C
6
H
5
NH
2
is 6.46 x 10
-6
. Write the Brønsted-Lowery reaction
and the equilibrium expression.
Ans = 7.66
Calculate the pH to the nearest 0.01 unit of a solution which is 0.075
M
in (CH
3
)
2
NH and 0.20
M
in (CH
3
)
2
NH
2
Cl. The K
b
for (CH
3
)
2
NH is 2.0 x 10
-11
. Write the Brønsted-Lowery reaction and
the equilibrium expression.
Ans = 2.88
Calculate the pH to the nearest 0.01 unit of a solution which is 0.0085
M
in NH
3
and 0.055
M
in
NH
4
Cl. The K
b
for NH
3
is 1.8 x 10
-5
. Write the Brønsted-Lowery reaction and the equilibrium
expression.
Ans = 8.44
