Question

Sulfur dioxide dissolves in water to produce an acid. What is the physical state of the acid formed?

Answer 1

• When sulfur dioxide is dissolved in water it forms sulfurous acid, $\left({\mathrm{H}}_2{\mathrm{SO}}_3\right)$.
• It is a colorless liquid.
• It is any oxyacid of sulfur.
• It is also a good reducing agent.
• The reaction is as follows:

$\underset{\mathrm{sulfur}\mathrm{dioxide}}{{\mathrm{SO}}_2\left(\mathrm{g}\right)}+\underset{\mathrm{water}}{{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)}\to \underset{\mathrm{sulfurous}\mathrm{acid}}{{\mathrm{H}}_2{\mathrm{SO}}_3\left(\mathrm{aq}\right)}$