WAEC - Chemistry (2012 - No. 35)

The oxidation number of Fe in [Fe(CN)\(_6\)]\(^{3-}\) is
+3
+2
-2
-3

Explanation

Let the oxidation number of Fe in the compound [Fe(CN)\(_6\)]\(^{3-}\) be x.

x + 6(-1) = -3

x - 6 = -3;

x = -3 + 6

x = +3

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