Calcium oxide, also known as quicklime, is a substance mainly used in chemical sector as intermediary in the cement and also concrete manufacturing and additionally in the soda ash synthesis process.

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Formula and also structure: Calcium oxide chemical formula is CaO and its molar fixed in 56.0774 g mol-1. The molecule is formed by the calcium cation Ca+2 and the oxygen anion O-2, which type a ionic bond. The calcium oxide ionic lattice is cubic and comparable to NaCl lattice, v an ion surrounding by 6 the opposite charge-ion. Its chemical structure deserve to be written as below, in the common representations offered for essential molecules.


Occurrence: Calcium oxide is uncovered in nature as part of mineral Lime, i beg your pardon is a product composed by calcium, magnesium and aluminium carbonates, oxides and hydroxides.

Preparation: Calcium oxide is mostly derived from the lime v heating till the decomposition of material into CaO and also CO2:

CaCO3(s) → CaO(s) + CO2(s)

Physical properties: Calcium oxide is one odorless, white come yellow, gray or brown granular powder. Its thickness is 3.34 g mL-1. The melting and also boiling points are 2613 ºC and 3850 ºC, respectively. That is soluble in water, reacting to form calcium hydroxide. Calcium oxide is insoluble in methanol and ethyl ether.

Chemical properties: Calcium oxide has a vast chemical reactivity. It can react in plenty of different ways, two instances are:

Calcium oxide is supplied to attain building material since when the is mixture v water deserve to reacts to type calcium hydroxide, i beg your pardon rapidily develops a harden material:

CaO + H2O → Ca(OH)2

It can also react with fossil resources to produces calcium carbide:

2 CaO(s) + 5 C(s) → 2 CaC2 (s) + CO2 (g)

Uses: Calcium oxide is really used in the manufacturing of structure materials together cement and concrete, similar to various other calcium compounds as calcium sulfate. Moreover, calcium oxide is provided in the manufacturing and production the substances as soda ash, bleaching liquids, dry and also desiccants and also calcium compounds. The is likewise used to create fertilizers and also as additive in the water treatment/purification.

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Health impacts / safety hazards: Calcium oxide can reason severe eye and mucous irritantion. The is exceptionally toxic through ingestion and is corrosive to the skin. When large quantities that calcium oxide are dissolved in water, the resulting reaction is highly exothermic. It is corrosive and can react violently through ethanol, phosphorus pentoxide and acids.