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Byju's Answer
Standard XII
Chemistry
Kohlrausch Law
Write the cel...
Question
Write the cell reaction of a standard Emf of the cell.
C
u
(
s
)
|
|
C
u
+
2
(
a
n
)
|
|
Z
n
+
2
(
a
n
|
Z
n
(
s
)
Open in App
Solution
A
n
o
d
e
:
Z
n
(
s
)
→
Z
n
2
+
+
2
e
−
C
a
t
h
o
d
:
C
u
2
+
+
2
e
−
→
C
u
(
s
)
o
v
e
r
a
l
l
Z
n
(
s
)
+
C
u
2
+
→
Z
n
2
+
+
C
u
(
s
)
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0
Similar questions
Q.
For the Daniel cell involving the cell reaction
Z
n
(
s
)
+
C
u
+
2
(
a
q
)
⇌
Z
n
+
2
(
a
q
)
+
C
u
(
s
)
the standard free energies of formation of
Z
n
(
s
)
,
C
u
(
s
)
,
C
u
+
2
(
a
q
)
and
Z
n
+
2
(
a
q
)
are 0, 0, 64.4 KJ/Mole and -154.0 KJ/Mole, respectively. Calculate the standard EMF of the cell?
Q.
Calculate the emf of the cell.
Z
n
|
Z
n
2
+
(
0.001
M
)
|
|
C
u
2
+
(
0.1
M
)
|
C
u
The standard potential of
C
u
/
C
u
2
+
half-cell is +0.34 and
Z
n
/
Z
n
2
+
is -0.76 V.
Q.
The standard reduction potentials of
Z
n
2
+
|
Z
n
and
C
u
2
+
|
C
u
are -0.76V and +0.34V respectively. What is the cell EMF of the following cell?
Z
n
|
Z
n
2
+
(
0.05
M
)
|
|
C
u
2
+
(
0.005
M
)
|
C
u
[
R
T
F
=
0.059
]
Q.
The standard emf for the given cell reaction,
Z
n
+
C
u
2
+
⟶
C
u
+
Z
n
2
+
is
1.10
V
at
25
o
C
. The emf for the cell reaction, when
0.1
M
C
u
2
+
and
0.1
M
Z
n
2
+
solutions are used at
25
o
C
is:
Q.
The standard emf for the cell reaction
Z
n
+
C
u
2
+
⟶
Z
n
2
+
C
u
1.10
volt at
25
C. The emf for the cell reaction when
0.1
M
C
u
2
+
and
0.1
M
Z
n
2
+
solutions are used at
25
C is:
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