Question

What happens when sulphur dioxide is dissolved in water?

Answer 1

Sulfur Dioxide

• Sulfur dioxide is also known as sulfurous anhydride, sulfurous acid anhydride, or sulfur oxide and has the chemical formula ${\mathrm{SO}}_2$.
• Sulfur dioxide was discovered by the Romans during the process of winemaking.
• It is an easily liquifiable colourless gas and has a pungent smell of rotten eggs.

Reaction

• Sulfur dioxide reacts with water to form sulfurous acid (H₂SO₃) as the product.
• The chemical reaction is as follows,

${\mathrm{SO}}_2\left(\mathrm{g}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)\to {\mathrm{H}}_2{\mathrm{SO}}_3\left(\mathrm{l}\right)$