Question

An ore when treated with dilute $\mathrm{HCl}$ gives out ${\mathrm{CO}}_2$. Name the process to concentrate this ore.

Answer 1

Carbonate ore

Carbonate ore gives out Carbon dioxide( ${\mathrm{CO}}_2$) gas when treated with dilute Hydrochloric acid( $\text{HCl}$). Carbonate ore is further concentrated into free metals with a process called calcination. In the process of calcination, the metal carbonate is heated in the absence of air in order to obtain metal oxide.

$\mathrm{Metal}\mathrm{carbonate}\stackrel{\mathrm{Calcination}}{\to }\mathrm{Metal}\mathrm{oxide}+{\mathrm{CO}}_2\left(\mathrm{g}\right)$

Hence, the process that is used to concentrate carbonate ore is calcination.