Question

Briefly describe how water reacts with sulphur dioxide, state experimental conditions, and write balanced chemical equations.

Answer 1

• When sulphur dioxide reacts with water, in the presence of excess SO.
• Sulphuric acid is formed else sulphurous acid is formed.
• Both the reactions are exothermic.
• ${\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{aq}\right)\to {\mathrm{H}}_2{\mathrm{SO}}_3\left(\mathrm{aq}\right)$
• It reacts with water at room temperature.