What is Fe2O3? Important knowledge about Fe2O3.

1. Definition of Fe₂O₃

Fe₂O₃, also known as Iron(III) oxide or Hematite, is a red to brown solid. It is one of the main substances of iron ore and is an important source of metallic iron.

1.1 Names
1.1.1 Common name: Iron (III) Oxide, Hematite
1.1.2 English name: Iron(III) oxide, Hematite
1.2. Atomic mass: 55.845 (iron), 15.999 (oxygen)
1.3. Molecular mass: 159.69 g/mol
1.3.1 Molecular structure: Consists of two iron atoms and three oxygen atoms
1.4 Ion structure: Fe₃+, O₂-

2. Properties of Fe₂O₃

2.1 Physical properties Fe₂O₃
State: Solid
Color: Red to brown
Smell: Odorless
PH level: Not applicable
2.2 Chemical properties Fe₂O₃: Insoluble in water, soluble in acid. Very little reaction with other substances at room temperature.

3. Common chemical equations of Fe₂O₃
   Metal reaction: Fe₂O₃ + 2Al -> 2Fe + Al₂O₃
   Acid reaction: Fe₂O₃ + 6HCl -> 2FeCl₃ + 3H₂O
   Non-metal reaction: Fe₂O₃ + 3C -> 2Fe + 3CO

4. Synthesis of Fe₂O₃

4.1 Laboratory synthesis of Fe₂O₃: Iron(III) oxide can be synthesized by heating iron in the air.
4.2 Industrial synthesis of Fe₂O₃: In industry, Fe₂O₃ is usually produced from iron ore through a high temperature process.