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Byju's Answer
Standard XII
Chemistry
Acidic Buffer Action
Which of the ...
Question
Which of the following mixture forms an acid buffer?
A
N
a
O
H
+
H
C
l
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B
C
H
3
C
O
O
H
+
C
H
3
C
O
O
N
a
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C
N
H
4
O
H
+
N
H
4
C
l
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D
H
2
C
O
3
+
(
N
H
4
)
2
C
O
3
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Solution
The correct option is
B
C
H
3
C
O
O
H
+
C
H
3
C
O
O
N
a
An acid buffer solution consists of a weak acid and its salt with strong base i.e
C
H
3
C
O
O
H
+
C
H
3
C
O
O
N
a
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0
Similar questions
Q.
Assertion: On mixing equal volumes of 1 M
H
C
l
and of 2 M
C
H
3
C
O
O
N
a
, an acidic buffer solution is formed.
Reason: The resultant mixture contains
C
H
3
C
O
O
H
and
C
H
3
C
O
O
N
a
which are parts of acidic buffer.
Q.
a) Calculate heat of dissociation for Acetic acid from the following data:
C
H
3
C
O
O
H
+
N
a
O
H
⟶
C
H
3
C
O
O
N
a
+
H
2
O
.
.
.
.
Δ
H
=
−
13.2
K
c
a
l
H
⊕
+
⊖
O
H
⟶
H
2
O
;
.
.
.
.
Δ
H
=
−
13.7
K
c
a
l
.
b) calculate heat of dissociation for
N
H
4
O
H
if
H
C
l
+
N
H
4
O
H
⟶
N
H
4
C
l
+
H
2
O
;
Δ
H
=
−
12.27
K
c
a
l
.
Q.
Which of the following will form a buffer solution?
(a)
C
H
3
C
O
O
N
a
+
C
H
3
C
O
O
H
(b)
N
a
C
l
+
N
a
O
H
(c)
N
H
4
C
l
+
N
H
4
O
H
(d)
N
a
2
S
O
4
+
H
2
S
O
4
Q.
Which of the following pairs of cations can be separated by adding
N
H
4
C
l
,
N
H
4
O
H
and then
(
N
H
4
)
2
C
O
3
to the mixture?
Q.
Assertion :The
p
H
of
N
H
4
C
l
solution in water is less than
7
and pH of
C
H
3
C
C
O
O
N
a
solution is more than
7
. Reason:
N
H
4
C
l
is a salt of weak base
N
H
4
O
H
and strong acid
H
C
l
whereas
C
H
3
C
O
O
N
a
is a salt of a weak acid
C
H
3
C
O
O
H
and strong base
N
a
O
H
.
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