iron oxide reacts with aluminum to give aluminum oxide and iron. what kind of chemical reaction is this?
This reaction is a single replacement (single displacement) reaction, also called a replacement reaction.
What is happening?
- Iron oxide (usually iron(III) oxide, Fe2O3\text{Fe}_2\text{O}_3Fe2O3) reacts with aluminum metal.
- Aluminum “kicks out” iron from iron oxide, forming aluminum oxide (Al2O3\text{Al}_2\text{O}_3Al2O3) and free iron metal.
So the general pattern is:
AB+C→AC+B\text{AB}+\text{C}\rightarrow \text{AC}+\text{B}AB+C→AC+B
which is the pattern for a single replacement reaction.
Extra classification labels
- It is also:
- A redox reaction, because electrons are transferred: aluminum is oxidized and iron(III) is reduced.
* A **thermite** reaction (or aluminothermic reaction), a very exothermic process used to produce molten iron, for example in welding rails.
But if the question is of the “multiple choice / basic types” kind (combustion, decomposition, replacement, synthesis), the correct answer is replacement (single replacement) reaction.
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