Question

What properties of sulfuric acid is shown by the reaction of concentrated sulfuric acid when heated with :

1. Potassium nitrate
2. Carbon

Answer 1

1. When sulfuric acid heated with potassium nitrate its shown non-volatile nature:
2. $$\begin{gathered} {\mathrm{KNO}}_3+{\mathrm{H}}_2{\mathrm{SO}}_4\stackrel{\mathrm{below}200°\mathrm{C}}{\to }{\mathrm{KHSO}}_4+{\mathrm{HNO}}_3 \\ (\mathrm{potassium}(\mathrm{conc}.\mathrm{sulfuric}(\mathrm{potassium}(\mathrm{nitric}\mathrm{acid}\left) \\ \mathrm{nitrate}\right)\mathrm{acid})\mathrm{hypo}-\mathrm{sulfate}) \end{gathered}$$

1. When sulfuric acid heated with carbon its show carbon oxidising nature :
2. $$\begin{gathered} \mathrm{C}+{\mathrm{H}}_2{\mathrm{SO}}_4\stackrel{∆}{\to }{\mathrm{CO}}_2+2{\mathrm{H}}_2\mathrm{O}+2{\mathrm{SO}}_2 \\ \left(\mathrm{carbon}\right)(\mathrm{conc}.\mathrm{sulfuric}(\mathrm{carbon}\left(\mathrm{water}\right)(\mathrm{sulfur} \\ \mathrm{acid})\mathrm{di}-\mathrm{oxide})\mathrm{di}-\mathrm{oxide}) \end{gathered}$$