# How does iron react with oxygen?

May 18, 2017

#### Explanation:

Oxidation of iron to give (various) rusts has been much studied, in that it causes building to fall over (eventually).

$F e \left(s\right) + \frac{1}{2} {O}_{2} \left(g\right) \rightarrow F e O \left(s\right)$

$2 F e \left(s\right) + \frac{3}{2} {O}_{2} \left(g\right) \rightarrow F {e}_{2} {O}_{3} \left(s\right)$

$F {e}_{3} {O}_{4}$, whose formulation as $F {e}_{2} {O}_{3} \cdot F e O$ is easier to consider as a mixed oxidation state metal oxide, occurs naturally as the mineral magnetite.