Question 5(d)(i)
[Maximum number: 1]
This question is about iron.
Iron forms rust.
Rusting is prevented by coating iron with zinc.
Name the substances that react with iron to form rust.
CAIE IGCSE Chemistry 9.5.1 Conditions required for the rusting of
Practise using tube experiments and word equations to decide when iron or steel forms hydrated iron(III) oxide.
How this is tested
- state oxygen and water as the two substances needed for iron to rust
- interpret nail-in-tube experiments to decide where hydrated iron(III) oxide forms