Question

Name a method for obtaining metals of very high impurity.

Answer 1

Metals when extracted out of minerals it is in impure form, it is very necessary to remove all the impurities from the metal to get a pure form.

The method which is used for obtaining metals of very high impurity is Refining.

Refining can be defined as the process of eliminating impurities from metals in order to achieve high-purity metals. Impurities are removed from unrefined metal using a variety of processes based on the metal's and impurities' qualities.

Example: Aluminum $\left(\mathrm{Al}\right)$ is extracted from its ore by the following reaction:

$\underset{\mathrm{Aluminium}\mathrm{oxide}}{2{\mathrm{Al}}_2{\mathrm{O}}_3\left(\mathrm{s}\right)}+\underset{\mathrm{Carbon}}{3\mathrm{C}(\mathrm{s}})\to \underset{\mathrm{Aluminium}}{4\mathrm{Al}\left(\mathrm{s}\right)}+\underset{\mathrm{Carbon}\mathrm{dioixde}}{3{\mathrm{CO}}_2\left(\mathrm{g}\right)}$