Question

Write the balanced chemical equation for the following reaction:

Action of dilute Sulphuric acid on Sodium sulphite.

Answer 1

Reaction between dilute Sulphuric acid and Sodium sulphite:

• Dilute sulphuric acid reacts with sulphites to form sulphur dioxide with effervescence.
• Dilute Sulphuric acid reacts with Sodium sulphite to give Sodium bisulphate, Sulphur dioxide gas, and water as a product.

Balance chemical equation:

$\underset{\mathrm{Sulphuric}\mathrm{acid}}{\underbrace{{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}}+\underset{\mathrm{Sodium}\mathrm{sulphite}}{\underbrace{{\mathrm{Na}}_2{\mathrm{SO}}_3\left(\mathrm{s}\right)}}\to \underset{\mathrm{Sodium}\mathrm{sulphate}}{\underbrace{{\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{aq}\right)}}+\underset{\mathrm{Sulphur}\mathrm{dioxide}\mathrm{gas}}{\underbrace{{\mathrm{SO}}_2\left(\mathrm{g}\right)}}+\underset{\mathrm{water}}{\underbrace{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}}$