Question

Making use one of substances chosen from those given below:

Dilute sulphuric acid

Sodium carbonate

Zinc

Sodium sulphite

Lead

calcium carbonate

Give the equations for the reactions by which you could obtain:

sulphur dioxide

Answer 1

1. By choosing sodium sulphite $\left({\mathrm{Na}}_2{\mathrm{SO}}_3\right)$from the given list and reacting it with sulphuric acid$\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$, sulphur dioxide $\left({\mathrm{SO}}_2\right)$is obtained.
2. $$\begin{gathered} {\mathrm{Na}}_2{\mathrm{SO}}_3\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{l}\right)\to {\mathrm{Na}}_2{\mathrm{SO}}_4\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{l}\right)+{\mathrm{SO}}_2\left(\mathrm{g}\right) \\ (\mathrm{Sodium}(\mathrm{Sulphur} \\ \mathrm{sulphite})\mathrm{dioxide}) \end{gathered}$$