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Standard VIII
Chemistry
Question
pH of
10
−
8
N NaOH is?
6.0
8.0
6.98
7.04
A
7.04
B
8.0
C
6.0
D
6.98
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Solution
Verified by Toppr
∵
[
N
a
O
H
]
=
10
−
8
M
∴
[
O
H
−
]
=
1
×
10
−
8
M
Here,
[
O
H
−
]
of water in this dilute solution should be added.
∴
[
O
H
−
]
T
o
t
a
l
=
1
×
10
−
7
M
H
2
O
a
p
p
r
o
x
.
+
1
×
10
−
8
M
N
a
O
H
=
11
×
10
−
8
M
∴
p
O
H
=
−
l
o
g
[
O
H
−
]
=
8
−
l
o
g
11
=
8
−
1.04
=
6.96
p
H
=
14
−
p
O
H
=
14
−
6.96
=
7.04
.
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