Question

Give balanced equation for Laboratory preparation of Nitric acid.

Answer 1

Laboratory preparation of Nitric acid:

• In the laboratory, NItric acid $\left({\mathrm{HNO}}_3\right)$ is prepared by the action of conc. ${\mathrm{H}}_2{\mathrm{SO}}_4$ on potassium nitrate $\left({\mathrm{KNO}}_3\right)$
• In this reaction, Non-volatile sulphuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ produces volatile Nitric Acid $\left({\mathrm{HNO}}_3\right)$.
• Balanced chemical equation : $\underset{\mathrm{Potassium}\mathrm{nitrate}}{{\mathrm{KNO}}_3\left(\mathrm{s}\right)}+\underset{\mathrm{Sulphuric}\mathrm{acid}}{{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}\to \underset{\mathrm{Potassium}\mathrm{hydrogen}\mathrm{sulphate}}{{\mathrm{KHSO}}_4\left(\mathrm{l}\right)}+\underset{\mathrm{Nitric}\mathrm{acid}}{{\mathrm{HNO}}_3\left(\mathrm{g}\right)}$