Question

Name:

The acid used in the preparation of a non-volatile acid.

Answer 1

Volatile acids are defined as compounds that undergo vaporization easily.

Nitric acid$\mathbf{\left(}{\mathbf{HNO}}_{\mathbf{3}}\mathbf{\right)}$ is used for the production of non-volatile sulphuric acid$\mathbf{\left(}{\mathbf{H}}_{\mathbf{2}}{\mathbf{SO}}_{\mathbf{4}}\mathbf{\right)}$.

Chemical equation:

$\underset{\left(\mathrm{Sulphur}\right)}{\underbrace{\mathrm{S}}\left(\mathrm{s}\right)}+\underset{(\mathrm{Nitric}\mathrm{acid})}{\underbrace{6{\mathrm{HNO}}_3\left(\mathrm{aq}\right)}}\to \underset{(\mathrm{Nitrogen}\mathrm{dioxide})}{\underbrace{6{\mathrm{NO}}_2\left(\mathrm{g}\right)}}+\underset{\underset{(\mathrm{Non}-\mathrm{volatile})}{(\mathrm{Sulphuric}\mathrm{acid})}}{\underbrace{{\mathrm{H}}_2{\mathrm{SO}}_4}\left(\mathrm{aq}\right)}+\underset{\left(\mathrm{water}\right)}{\underbrace{2{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}}$

Hence, nitric acid is used in the preparation of a non-volatile acid.