Question

Name the acid used in the laboratory preparation of hydrogen.

Answer 1

Laboratory preparation of hydrogen.

Hydrogen is prepared in the laboratory by the action of dilute hydrochloric acid ($\mathrm{HCl}$) or dilute sulphuric acid (${\mathrm{H}}_2{\mathrm{SO}}_4$) on zinc granules$$\begin{gathered} \mathrm{Zn}+2\mathrm{HCl}\to {\mathrm{ZnCl}}_2+{\mathrm{H}}_2 \\ \mathrm{Zinc}\mathrm{Hydrochlloric}\mathrm{acid}\mathrm{Zinc}\mathrm{chloride}\mathrm{Hydrogen}\mathrm{gas} \\ \mathrm{Zn}+{\mathrm{H}}_2{\mathrm{SO}}_4\to {\mathrm{ZnSO}}_4+{{\mathrm{H}}_2}_{} \\ \mathrm{Zinc}\mathrm{Sulphuric}\mathrm{acid}\mathrm{Zinc}\mathrm{sulphate}\mathrm{Hydrogen}\mathrm{gas} \end{gathered}$$