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Byju's Answer
Standard XII
Chemistry
Common Ion Effect
What will the...
Question
What will the molarity of
P
b
2
+
ions in the solution after completion of the reactions?
A
8.4
×
10
−
10
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B
1.6
×
10
−
10
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C
2.8
×
10
−
10
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D
6.1
×
10
−
10
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Solution
The correct option is
D
2.8
×
10
−
10
As we know, due to common ion
(
I
O
⊝
3
)
left in the solution, the solubility
P
b
(
I
O
3
)
2
decreases.
[
I
O
⊝
3
]
≈
1.5
50
=
0.03
M
S
=
K
s
p
(
0.03
)
2
=
2.6
×
10
−
13
×
10
4
9
=
0.28
×
10
−
9
=
2.8
×
10
−
10
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Similar questions
Q.
Assertion: A solution contains 0.1 M each of
P
b
2
+
,
Z
n
2
+
,
N
i
2
+
ions. If
H
2
S
is passed into this solution at
25
o
C
P
b
2
+
,
N
i
2
+
,
Z
n
2
+
will get precipitated simultaneously.
Reason:
P
b
2
+
and
Z
n
2
+
will get precipited if the solution contains 0.1 M HCl.
[
K
1
H
2
S
=
10
−
7
,
K
2
H
2
S
=
10
−
14
,
K
s
p
P
b
S
=
3
×
10
−
29
K
s
p
N
i
S
=
3
×
10
−
19
.
K
s
p
Z
n
S
=
10
−
25
]
Q.
Find the minimum concentration of
P
b
2
+
ions that will initiate the precipitation of
P
b
S
O
4
from a solution containing
0.005
m
o
l
L
−
1
of
S
O
2
−
4
ions?
(Given
K
s
p
for
B
a
S
O
4
=
1.8
×
10
−
8
)
Q.
25 ml solution has
[
C
2
O
4
]
2
−
ions. It is found to require 10 ml of
N
10
acidic
K
2
C
r
2
O
7
for a complete reaction. Find out the molarity of
[
C
2
O
4
]
2
−
in the solution.
Q.
At equilibrium the concentration of nitrigen
3.0
×
10
−
3
molar, oxygen =
4.2
×
10
−
3
molar &
N
O
=
2.8
×
10
−
3
molar in a ceiled vesel at 800 k. What will be
K
c
for the reaction
N
2
+
O
2
→
2
N
O
?
Q.
A solution of sodium hydroxide (NaOH) has a pH of 10. What will be the concentration of
O
H
−
ions in the given solution?
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