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Standard XII
Chemistry
Electrode Potential
Determine the...
Question
Determine the standard reduction potential for the half reaction:
C
l
2
+
2
e
−
⟶
2
C
l
−
Given:
P
t
2
+
2
C
l
⟶
P
t
+
C
l
2
,
E
0
c
e
l
l
=
−
0.15
V
P
t
2
+
2
e
−
⟶
P
t
,
E
0
=
1.20
V
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Solution
Anode :
2
C
l
(
−
)
→
C
l
2
+
2
e
−
Cathode :
P
t
2
+
+
2
e
−
→
P
t
∴
E
c
e
l
l
=
E
R
−
E
L
−
0.15
=
E
P
t
2
+
/
P
t
−
E
C
l
2
/
C
l
(
−
)
−
0.15
=
1.20
−
E
E
=
1.20
+
0.15
E
=
1.35
V
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Similar questions
Q.
Determine the standard reduction potential for the half reaction.
C
l
2
+
2
e
−
→
2
C
l
−
Given:
P
t
2
+
+
2
C
l
−
→
P
t
+
C
l
2
,
E
c
e
l
l
=
−
0.15
V
P
t
2
+
+
2
e
−
→
P
t
,
E
=
1.20
V
Q.
The standard reduction potential for the half-cell reaction,
C
l
2
+
2
e
−
→
2
C
l
−
will be:
P
t
2
+
+
2
C
l
−
→
P
t
+
C
l
2
,
E
o
c
e
l
l
=
−
0.15
V;
P
t
2
+
+
2
e
−
→
P
t
,
E
o
=
1.20
V
Q.
The standard reduction potential for the half-cell reaction,
C
l
2
+
2
e
−
→
2
C
l
−
if:
P
t
2
+
+
2
C
l
−
→
P
t
+
C
l
2
,
E
o
cell
=
−
0.15
V
P
t
2
+
+
2
e
−
→
P
t
,
E
o
=
1.20
V
Q.
Question below
refers to the overall reaction and half-reactions with standard reduction potentials below.
2
F
e
2
+
+
C
l
2
→
2
F
e
3
+
+
2
C
l
?
F
e
3
+
+
e
−
→
F
e
2
+
;
E
o
r
e
d
= 0.77 volts
C
l
2
+
2
e
−
→
2
C
l
−
;
E
o
r
e
d
= 1.36 volts
Find the overall potential for the reaction ?
Q.
Calculate the standard potential for the reaction,
H
g
2
C
l
2
+
C
l
2
→
2
H
g
+
+
4
C
l
−
Given:
H
g
2
C
l
2
+
2
e
−
→
2
H
g
+
2
C
l
−
;
E
∘
=
0.270
v
o
l
t
H
g
2
+
2
→
2
H
g
2
+
+
2
e
−
;
E
∘
=
−
0.92
v
o
l
t
2
H
g
→
H
g
2
+
2
+
2
e
−
;
E
∘
=
−
0.79
v
o
l
t
C
l
2
+
2
e
−
→
2
C
l
−
;
E
∘
=
1.36
v
o
l
t
.
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