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WAEC - Chemistry (2010 - No. 28)
What is the change in oxidation number of manganes in the reaction represented by the following equation? MnO
-
4(aq)
+ 8H
+
(aq)
+ 5e
-
→ Mn
2+
(aq)
+ 4H
2
O
(l)
+3 to + 2
+ 4 to + 2
+ 5 to + 2
+ 7 to 2
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