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Tardigrade
Question
Chemistry
The pH of the solution containing 50 mL each of 0.10 M sodium acetate and 0.01 M acetic acid is [Given pK a of .CH 3 COOH =4.57]
Q. The
p
H
of the solution containing
50
m
L
each of
0.10
M
sodium acetate and
0.01
M
acetic acid is [Given
p
K
a
of
C
H
3
COO
H
=
4.57
]
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Equilibrium
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A
2.57
8%
B
5.57
50%
C
3.57
33%
D
4.57
8%
Solution:
Weak acid
(
C
H
3
COO
H
)
and salt of weak acid-strong base
(
C
H
3
COON
a
)
form an acidic buffer.
Sodium acetate
(
C
H
3
COON
a
)
=
0.10
M
;
Acetic acid
(
C
H
3
COO
H
)
=
0.01
M
;
p
H
of acidic buffer solution is given by
p
H
=
p
K
a
+
lo
g
[
Acid
]
[
Salt
]
=
4.57
+
lo
g
(
0.01
0.1
)
=
5.57