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

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Formula and structure: Calcium oxide chemistry formula is CaO and also its molar mass in 56.0774 g mol-1. The molecule is developed by the calcium cation Ca+2 and the oxygen anion O-2, which form a ionic bond. The calcium oxide ionic lattice is cubic and comparable to NaCl lattice, v an ion surrounded by 6 opposite charge-ion. Its chemical structure have the right to be composed as below, in the typical representations offered for necessary molecules.

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Occurrence: Calcium oxide is uncovered in nature as component of mineral Lime, i m sorry is a material composed through calcium, magnesium and also aluminium carbonates, oxides and also hydroxides.

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

CaCO3(s) → CaO(s) + CO2(s)

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

Chemical properties: Calcium oxide has actually a huge chemical reactivity. It have the right to react in countless different ways, two examples are:

Calcium oxide is offered to obtain building material because when it is mixture v water deserve to reacts to form calcium hydroxide, which rapidily creates a harden material:

CaO + H2O → Ca(OH)2

It can likewise react v fossil sources 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 structure materials together cement and also concrete, similar to other calcium compounds together calcium sulfate. Moreover, calcium oxide is offered in the manufacturing and also production of substances as soda ash, bleaching liquids, dry and desiccants and also calcium compounds. It is likewise used to produce fertilizers and as additive in the water treatment/purification.

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