Question

Sulphuric acid is not used in the laboratory for the preparation of carbon dioxide. why?

Answer 1

Understanding the concept:

• Sulphuric acid is the strongest acid, its chemical formula is ${\mathrm{H}}_2{\mathrm{SO}}_4$.
• It is also called the king of chemicals because it is widely used in industries.

Explanation not to use carbon sulphuric acid:

• Calcium carbonate reacts with dilute sulphuric acid.
• However, it is not used in laboratories because the calcium sulfate formed during the reaction is water-insoluble.
• It stops the reaction by covering it with marble fragments or chips.
• In other words:
• Because calcium sulfate is only sparingly soluble, it settles on marble chips and stops the process. The reaction is given as follows;
• $$\begin{gathered} {\mathrm{CaCO}}_3\left(\mathrm{s}\right)+{\mathrm{H}}_2{\mathrm{SO}}_4\left(\mathrm{l}\right)\to {\mathrm{CaSO}}_4\left(\mathrm{s}\right)+{\mathrm{H}}_2\mathrm{O}\left(\mathrm{g}\right)+{\mathrm{CO}}_2\left(\mathrm{g}\right) \\ \mathrm{Precipitate}\mathrm{formation} \end{gathered}$$