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Standard XII
Chemistry
Nucleophilic Addition at the Carbonyl
A weak base B...
Question
A weak base BOH is titrated with a strong acid HA.When 10 mL of HA is added, pH is found to be9.00 and when 25 mL is added, pH is 8.00. Thevolume of the acid required to reach the equivalencepoint is(a) 55 mL (b) 40 mL (c) 30 mL (d) 50 mL
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Q.
A solution of weak acid was titrated with base
N
a
O
H
. The equivalence point was reached when
36.12
m
L
of
0.1
M
N
a
O
H
have been added. Now,
18.06
m
L
of
0.1
M
H
C
l
were added to titrated solution, the
p
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Q.
A solution of weak acid
H
A
was titrated with base
N
a
O
H
. The equivalence point was reached when
36.12
m
L
of
0.1
M
N
a
O
H
was added. Now
18.06
m
L
of
0.1
M
H
C
l
were added to titrated solution, the pH was found to be
4.92
. What will be the
p
H
of the solution obtained by mixing
10
m
L
of
0.2
M
N
a
O
H
and
10
m
L
of
0.2
M
H
A
?
Q.
A solution of weak acid
H
A
was titrated with base
N
a
O
H
. The equivalent point was reached when
40
m
L
of
0.1
M
N
a
O
H
has been added. Now
20
m
L
of
0.1
M
H
C
l
were added to titraded solution, the
p
H
was found to be
5.0
. What will be the
p
H
of the solution obtained by mixing
20
m
L
of
0.2
M
N
a
O
H
and
20
m
L
of
0.2
M
H
A
?
Q.
A weak acid
H
A
after treatment with
12
ml
of
0.1
M
strong base
B
O
H
has
p
H
=
5
. At the end point, the volume of same base required is
13.2
ml
.
K
a
of acid is:
Q.
A
50
m
L
solution of
0.2
M
C
H
3
C
O
O
H
is titrated with
0.2
M
N
a
O
H
. Find the
p
H
of solution when:
(a)
0
m
L
N
a
O
H
is added (
p
H
i
n
i
t
i
a
l
)
(b)
10
m
L
of
N
a
O
H
has been added (
p
H
10
m
L
)
Given:
K
a
(
C
H
3
C
O
O
H
)
=
1.8
×
10
−
5
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