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Byju's Answer
Standard XII
Chemistry
Classification of Alcohols
Calculate K...
Question
Calculate
K
a
for
H
C
N
.(Given
K
b
(
C
N
−
)
=
2.5
×
10
−
5
).
A
10
−
5
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B
2
×
10
−
7
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C
4
×
10
−
10
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D
None of these
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Solution
The correct option is
B
4
×
10
−
10
we know,
K
w
a
t
e
r
=
k
a
×
k
b
∴
k
a
=
k
w
k
b
=
10
−
14
2.5
×
10
−
5
k
a
=
4
×
10
−
10
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0
Similar questions
Q.
Calculate :
K
a
for
H
C
N
given
K
b
(
C
N
−
)
=
2.5
×
10
−
5
Q.
K
a
for
H
C
N
and
C
H
3
C
O
O
H
are
4.9
×
10
−
10
and
1.8
×
10
−
5
respectively. Calculate the equilibrium constant for the reaction:
C
H
3
C
O
O
H
+
N
a
C
N
⇌
C
H
3
C
O
O
N
a
+
H
C
N
Q.
If
K
a
of
H
C
N
=
4
×
10
−
10
, then the
p
H
of
2.5
×
10
−
1
molar
H
C
N
(
a
q
)
is:
Q.
Calculate the
p
H
of
0.01
M solution of
N
H
4
C
N
. The dissociation constants
K
a
for
H
C
N
=
6.2
×
10
−
10
and
K
b
for
N
H
3
=
1.6
×
10
−
5
.
Q.
Compare the acidic nature of
0.1
M
H
C
N
O
with that of
0.2
M
H
C
N
. Given
K
a
for
H
C
N
O
=
1.2
×
10
−
4
and
K
a
for
H
C
N
=
4.0
×
10
−
10
at
298
K
.
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