Calcium oxide, also known together quicklime, is a substance largely used in chemical market as intermediary in the cement and also concrete production and additionally in the soda ash synthetic process.

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


Occurrence: Calcium oxide is found in nature as component of mineral Lime, which is a material composed by calcium, magnesium and aluminium carbonates, oxides and also hydroxides.

Preparation: Calcium oxide is mostly acquired from the lime through heating till the decomposition that material right into CaO and CO2:

CaCO3(s) → CaO(s) + CO2(s)

Physical properties: Calcium oxide is an odorless, white to yellow, gray or brown granular powder. Its thickness is 3.34 g mL-1. The melting and also boiling points space 2613 ºC and also 3850 ºC, respectively. It is soluble in water, reaction to type calcium hydroxide. Calcium oxide is insoluble in methanol and also ethyl ether.

Chemical properties: Calcium oxide has a huge chemical reactivity. It deserve to react in many different ways, two examples are:

Calcium oxide is provided to achieve building material since when that is mixture through water can reacts to kind calcium hydroxide, which rapidily forms a harden material:

CaO + H2O → Ca(OH)2

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

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

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

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Health results / safety hazards: Calcium oxide can cause severe eye and also mucous irritantion. It is very toxic by ingestion and also is corrosive to the skin. When big quantities that calcium oxide are dissolved in water, the resulting reaction is very exothermic. The is corrosive and also can react violently through ethanol, phosphorus pentoxide and also acids.