This question is about the reactivity of metals.
A metal is heated with the oxide of a different metal. The table shows the results of two experiments.
| Mixture | Result |
|---|---|
| iron + copper(II) oxide | reaction |
| iron + aluminium oxide | no reaction |
Explain how these results show the order of reactivity of aluminium, copper, and iron.
The reaction between magnesium powder and iron(III) oxide powder can be used to produce iron metal.
The word equation for the reaction that occurs is:
magnesium+iron(III) oxide→magnesium oxide+iron \text{magnesium} + \text{iron(III) oxide} \rightarrow \text{magnesium oxide} + \text{iron} magnesium+iron(III) oxide→magnesium oxide+ironWrite a chemical equation for this reaction.
Explain which substance is oxidised in this reaction.
Explain why magnesium and iron(III) oxide are used in powdered form rather than in large pieces.
