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Byju's Answer
Standard XII
Chemistry
SHE
Which has max...
Question
Which has maximum potential for the half-cell reaction?
2
H
+
+ 2
e
-
→
H
2
A
1.0 M HCl
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B
A solution having pH 4
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C
Pure water
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D
1.0 M NaOH
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Solution
The correct option is
A
1.0 M HCl
using kontraurchs law which says
A
o
m
(
H
2
O
)
=
A
o
m
(
H
C
l
)
+
A
o
(
N
a
O
H
)
−
A
o
m
(
N
a
C
l
)
We know the value of
A
o
m
for
H
C
l
,
N
a
O
H
and
N
a
C
l
thus by priosi calculations
A
o
m
H
2
O
can br determined
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0
Similar questions
Q.
Which has maximum potential for half cell reaction 2H+ +2e= H2
1 M HCl
A solution of ph 4
pure water
1 M NaOH
please do explain why the other three options are incorrect also
Q.
For the half cell reaction at 298 K,
H
+
(
a
q
)
+
e
−
→
1
2
H
2
(
g
)
(1 atm
)
Q.
P
t
(
H
2
)
|
H
+
(
p
H
=
2
)
|
H
+
(
p
H
=
3
)
|
P
t
(
H
2
)
1 atm 1 atm
The cell reaction for the given cell is:
Q.
Estimate the cell potential of a Daniel cell having 1.0 M
Z
n
+
+
and originally having 1.0 M
C
u
+
+
after sufficient
N
H
3
has been added to the cathode compartment to make
N
H
3
concentration 2.0 M. Given
K
f
for
[
C
u
(
N
H
3
)
4
]
2
+
=
1
×
10
12
,
E
∘
for the reaction in V,
Z
n
+
C
u
2
+
→
Z
n
2
+
+
C
u
is 1.1 V.
(write the value to the nearest integer)
Q.
Which has higher PH value, 1M HCL or 1M naoh solution?
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