Preparation
Iron (III) oxide is a product of the oxidation of iron. It can be prepared in the laboratory by electrolyzing a solution of sodium bicarbonate, an inert electrolyte, with an iron anode:
- 4 Fe + 3 O2 + 2 H2O → 4 FeO(OH)
The resulting hydrated iron(III) oxide, written here as Fe(O)OH, dehydrates around 200 °C.
- 2 FeO(OH) → Fe2O3 + H2O
It can also be prepared by the thermal decomposition of iron (III) hydroxide under temperature above 200 °C.
- 2 Fe(OH)3 → Fe2O3 + 3H2O
Read more about this topic: Iron(III) Oxide
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