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Problem
Problem
What is the cell potential, in V, for the reaction that occurs when the following two half-cells are connected?
E
⊖
/
V
E^\ominus / \text{V}
E
⊖
/
V
Fe
2
+
(
aq
)
+
2
e
−
⇌
Fe
(
s
)
\text{Fe}^{2+}(\text{aq}) + 2\text{e}^- \rightleftharpoons \text{Fe}(\text{s})
Fe
2
+
(
aq
)
+
2
e
−
⇌
Fe
(
s
)
-0.44
Cr
2
O
7
2
−
(
aq
)
+
14
H
+
(
aq
)
+
6
e
−
⇌
2
Cr
3
+
(
aq
)
+
7
H
2
O
(
l
)
\text{Cr}_2\text{O}_7^{2-}(\text{aq}) + 14\text{H}^+(\text{aq}) + 6\text{e}^- \rightleftharpoons 2\text{Cr}^{3+}(\text{aq}) + 7\text{H}_2\text{O}(\text{l})
Cr
2
O
7
2
−
(
aq
)
+
14
H
+
(
aq
)
+
6
e
−
⇌
2
Cr
3
+
(
aq
)
+
7
H
2
O
(
l
)
+1.33
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