Carbon monoxide is passed over heated iron(III) oxide. Iron and carbon dioxide are produced.
Fe2O3+3CO→2Fe+3CO2\text{Fe}_2\text{O}_3 + 3\text{CO} \rightarrow 2\text{Fe} + 3\text{CO}_2Fe2O3+3CO→2Fe+3CO2
The table shows the masses when both reactants react completely.
| Reactant | Mass of reactant (g) | Product | Mass of product (g) |
|---|---|---|---|
| Iron(III) oxide | 16.0 | Iron | 11.2 |
| Carbon monoxide | 8.4 | Carbon dioxide | 13.2 |
Use the data to explain why this reaction is a redox reaction.
86 exam-style questions on AQA GCSE Chemistry 4.1 Reactivity of metals, covering 4.1.1 Metal oxides, 4.1.2 The reactivity series, 4.1.3 Extraction of metals and reduction, and 4.1.4 Oxidation and reduction in terms of electrons. Each one has a worked solution and a mark scheme showing where the marks go.