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Byju's Answer
Standard XII
Chemistry
Acidic Buffer Action
CH 3 COOH is ...
Question
C
H
3
C
O
O
H
is titrated with
N
a
O
H
solution. Find the ratio
(
[
C
H
3
C
O
O
N
a
]
[
C
H
3
C
O
O
H
]
)
when the volume of
N
a
O
H
added is half that of equivalence point.
A
2.5
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B
0.5
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C
0.75
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D
1
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Solution
The correct option is
D
1
C
H
3
C
O
O
H
(
a
q
)
+
N
a
O
H
(
a
q
)
→
C
H
3
C
O
O
N
a
(
a
q
)
+
H
2
O
(
l
)
At half equivalence point,
p
H
=
p
K
a
Since for an acidic buffer ,
p
H
=
p
K
a
+
l
o
g
(
[
C
H
3
C
O
O
N
a
]
[
C
H
3
C
O
O
H
]
)
When
p
H
=
p
K
a
l
o
g
(
[
C
H
3
C
O
O
N
a
]
[
C
H
3
C
O
O
H
]
)
=
0
(
[
C
H
3
C
O
O
N
a
]
[
C
H
3
C
O
O
H
]
)
=
10
0
=
1
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0
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