Question

Write the chemical formulae of calcium oxide.

Answer 1

Hint:Calcium oxide chemical formula is CaO and its molar mass is 56.0774 $g/mo{l^{ - 1}}$. The molecule is formed by the calcium cation $C{a^{ + 2}}$ and the oxygen anion ${O^{ - 2}}$, which form an ionic bond.

Complete answer:
Calcium oxide, also known as quicklime, is a substance largely used in the chemical industry as intermediary in the cement and concrete production and also in the soda ash synthesis process. Calcium oxide is found in nature as part of mineral Lime, which is a material composed by calcium, magnesium and aluminium carbonates, oxides and hydroxides. Calcium oxide chemical formula is CaO and its molar mass is 56.0774 $g/mo{l^{ - 1}}$. Calcium oxide is mostly obtained from the lime through heating until the decomposition of material into CaO and $C{O_2}$:
$CaC{O_3}\left( s \right) \to CaO\left( s \right) + C{O_2}\left( s \right).$
The molecule is formed by the calcium cation $C{a^{ + 2}}$ and the oxygen anion ${O^{ - 2}}$, which form an ionic bond. The calcium oxide ionic lattice is cubic and similar to NaCl lattice, with an ion surrounded by 6 opposite charge-ions. Its chemical structure can be written as below, in the common representations used for organic molecules.
    $C{a^{ + 2}}$ ${O^{ - 2}}$

Thus, the chemical formula of calcium oxide is CaO.

Note:
Calcium oxide is very used in the production of building materials as cement and concrete, similar to other calcium compounds as calcium sulphate. Moreover, calcium oxide is used in the manufacturing and production of substances as soda ash, bleaching liquids, dry and desiccants and calcium compounds. It is also used to produce fertilizers and as additives in the water treatment/purification.