Question

Write the chemical formula of the following:
-Marble

Answer 1

Hint:Marble exists as sediments of carbonate salts of alkaline earth metals. It is colorless, odourless and non toxic substance.

Complete answer:
Marble is obtained through a process of metamorphism in which the original rocks transformed into new rocks. Marble is composed of alkaline earth minerals and carbonate, which is commonly known as calcite or dolomite.
The texture of marble appears to be non-foliated i.e. it does not exist in layers. The marble is used for making sculptures and monuments. The material is termed as metamorphosed limestone.
The chemical name of marble is calcium carbonate. The chemical formula of marble is \[CaC{O_3}\]. It is an inorganic chemical compound consisting of \[C{a^{2 + }}\] ions and \[C{O_3}^{2 - }\] ions. It is found as a white mineral in chalks, limestones and marbles.
Marble undergo destruction in presence of acids. The marble reacts with acids and produces carbonic acid and carbon dioxide. Thus the marble is damaged by acid rains.
\[CaC{O_3}\left( s \right) + 2{H^ + }\left( {aq} \right) \to C{a^{2 + }}\left( {aq} \right) + C{O_2}\left( g \right) + {H_2}O\left( l \right)\]
Thus any acidic solution which contains hydrogen ions should be avoided while using marble. The gravestones and the sculpture are affected every year by acid rain.
Nearly \[17\] types of marble are found around the world. Pure white marble is generated by metamorphism of limestone or dolomite protolith. The different types of marble have characteristic colours like white, blue, gray, pink, green and black which depend on the presence of impurities such as iron oxides, clay, sand, silt and magnesium etc.

Note:
White marble is excellent for making sculptures. The carbonates are calcium salts which are easily modified to various shapes. Construction marble is a type of stone which is mainly composed of calcite, dolomite or serpentine.