Question

What is calcination? Explain it with reactions.

Answer 1

The metals are obtained from their oxide ores after they have undergone the process of reduction or the process of electrolysis. We can easily obtain the metal from their oxides instead of their sulphides or carbonates. Calcination is a process to obtain the metal oxide by passing the ore of metal in the absence of air or limited supply of air.

Complete step-by-step answer:
Calcination is the process for converting the ore of the metal to the oxide by heating it strongly. We heat the ore of the metal below the melting point in the absence or limited supply of air. We use this process of calcination to convert the carbonate or the hydroxides of the metal to their respectives oxides. It is a thermal process which causes thermal decomposition in the reaction.

Calcination is a Latin word which means to burn lime. Calcination is used to decompose the limestone to lime and carbon dioxide.the reaction for it is the following:
$CaC{{O}_{3}}\to CaO+C{{O}_{2}}$

The products which we obtain from calcination are known as calcining.
We can form anhydrous iron from iron calcination. The reaction for it is the following:
$2F{{e}_{2}}{{O}_{3}}.3{{H}_{2}}O\to 2F{{e}_{2}}{{O}_{3}}+3{{H}_{2}}O$

Note: The moisture is removed from the ore during the process of calcination. gypsum is also calculated by the process of calcination. There are three different types of gypsum such as satir spar, alabaster and selenite. We use the process of calcination for the purification of solids because at high temperature we are able to remove the volatile substances and the oxidising portion of the substance.