Inorganic compounds are containing metal oxide (III) or oxide Fe₂O₃. It's one amongst the three principal oxides of iron, the opposite 2 being iron (second) oxide (Feo), that is rare; associate degreed iron (II, III) oxide (Fe₃O₄), which conjointly happens naturally as a mineral magnet.
As a mineral referred to as haematite, Fe₂O₃ is the main iron supply for the steel industry. Acids promptly attack Fe₂O₃. Iron (III) oxide is commonly called rust, and at a minimum, this label is helpful as a result of rust shares many properties and features a similar composition.
However, in chemistry, rust is taken into account to be a scary defining part represented as a hydrated metal oxide.
Structure of Iron Oxide
Fe₂O₃ can be found in different polymorphics. The principal, iron, iron adopts eighty-eight combining geometry. In other words, each expense center is linked to six oxygen ligands. Y polymorphic, some Fe sits at the tetrahedral site with four oxygen ligands.
Some important features of iron oxide are listed below
Reactions of Iron Oxide
Fe₂O₃ + 3 CO → 2 Fe + 3 CO₂
2 Al + Fe₂O₃ → 2 Fe + Al₂O₃
This process is used for welding a thick metal rail over the rail with a ceramic container to disperse molten iron between two fence sections. Thermite is also used to manufacture small-scale cast-iron weapons and carvings, and tools.
A partial reduction with hydrogen at about 400°C produces magnetite, a black magnetic component that contains both Fe (III) and Fe (II) 3 Fe₂O₃ + H₂ → 2Fe₃O₄ + H₂O.
Iron oxide (III) dissolves in water but dissolves readily in strong acids, e.g., hydrochloric acid and sulphuric acid. It also dissolves well in chelators solutions like EDTA and oxalic acid.
Iron oxides (III) heated by other metal oxides or carbonates give substances known as Ferrata (III) ZnO + Fe₂O₃ Zn (FeO₂)₂.
Preparation of Iron Oxide
The oxidation of iron produces iron oxide (III). It can be prepared in the lab by electrolysis of an inert electrolyte, sodium bicarbonate solution with ferrous knots: 4F + 3O₂ + 2H₂ and 4F (OH).
The result, written here as FeO (OH), is that hydrated iron oxide (III) contains approximately 200 centigrade of dehydration. 2 Feo (OH) → Fe₂O₃ + H₂O.