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Chemistry
Chemistry
Problem
For aqueous basic conditions, use the two half-reactions provided to write the balanced overall redox equation. (i)
Z
n
+
4
O
H
−
→
Z
n
(
O
H
)
4
2
−
+
2
e
−
\mathrm{Zn} + 4\,\mathrm{OH}^{-} \to \mathrm{Zn(OH)}_{4}^{2-} + 2\,\mathrm{e}^{-}
Zn
+
4
OH
−
→
Zn
(
OH
)
4
2
−
+
2
e
−
(ii)
O
2
+
2
H
2
O
+
4
e
−
→
4
O
H
−
\mathrm{O}_{2} + 2\,\mathrm{H}_{2}\mathrm{O} + 4\,\mathrm{e}^{-} \to 4\,\mathrm{OH}^{-}
O
2
+
2
H
2
O
+
4
e
−
→
4
OH
−
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