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Byju's Answer
Standard XII
Chemistry
Factors Affecting Alpha
100mL of 0....
Question
100
m
L
of
0.1
M
H
C
l
is mixed with
100
m
L
of
0.01
M
H
C
l
. The pH of the resulting solution is:
A
2.0
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B
1.0
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C
1.26
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D
None of these
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Solution
The correct option is
C
1.26
When you add two different concentrations of same strong acid, the
p
H
contribution will be from both concentrations.
M
1
=
0.1
M
,
V
1
=
100
m
l
M
2
=
0.01
M
,
V
2
=
100
m
l
Final volume of solution is
100
+
100
=
200
m
l
The final concentration of mixture will be calculated as
M
V
=
M
1
V
1
+
M
2
V
2
⇒
M
(
100
+
100
)
=
0.1
×
100
+
0.01
×
100
M
=
(
10
+
1
)
200
=
0.055
M
p
H
=
−
l
o
g
[
H
+
]
=
−
l
o
g
(
0.055
)
=
1.259
∼
1.26
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