4Fe+3O2–2Fe2O3

What happens to atoms of Fe and O2 during the reaction

1 answer

In the reaction \(4 \text{Fe} + 3 \text{O}_2 \rightarrow 2 \text{Fe}_2\text{O}_3\), the following changes occur to the atoms of iron (Fe) and oxygen (O2):

  1. Iron (Fe):

    • Four iron atoms (Fe) are consumed in the reaction.
    • These iron atoms combine with oxygen to form iron(III) oxide, \( \text{Fe}_2\text{O}_3 \).
    • Specifically, for every four iron atoms consumed, two formula units of iron(III) oxide are produced.
  2. Oxygen (O2):

    • Three molecules of diatomic oxygen (O2) are consumed in the reaction.
    • The oxygen molecules provide oxygen atoms that react with iron.
    • Each O2 molecule contributes two oxygen atoms, leading to the formation of a total of six oxygen atoms that combine with the iron.
    • These six oxygen atoms result in the formation of two formula units of iron(III) oxide, \( \text{Fe}_2\text{O}_3 \).

In summary, during the reaction, four iron atoms and three molecules of oxygen are converted into two formula units of iron(III) oxide, resulting in a chemical transformation where the oxidation state of iron changes from 0 in elemental Fe to +3 in \( \text{Fe}_2\text{O}_3 \) as it combines with oxygen.

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