Question

3) What is the oxidation number change for the iron atom in the following reaction? 3)...

3) What is the oxidation number change for the iron atom in the following reaction? 3) 2 Fe2O3(s) + 3 C(s) → 4 Fe(s) + 3 CO2(g) I got +3? but why they said it should be -3

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Answer #1

In Fe2O3, the oxidation number of iron is +3.

In Fe, the oxidation number of iron is 0.

The oxidation number changes from +3 to 0.

Hence, the change in the oxidation number is .

Note: The negative value for the change in the oxidation number indicates that there is decrease in the oxidation number.

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