How does iron rust?

1 Answer
Oct 2, 2017

#4Fe+ 3O_2 +6 H_2 O → 4Fe(OH)_3#

Explanation:

Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust.

Word equation:
iron + water + oxygen → hydrated iron(III) oxide

Chemical equation:
#4Fe+ 3O_2 +6 H_2 O → 4Fe(OH)_3#