question_answer

Explain that \[C{{O}_{2}}\] is an acidic oxide with the help of an activity.

Answer:

Burn a piece of soft coke in hard glass test tube and pass the gas produced in water.

Then add blue litmus solution (to test the formation of acid) to the test-tube in which carbon dioxide gas is dissolved. The colour of the solution turns red. The following chemical reactions are going on during this experiment.

(i) \[\begin{align}   & C+{{O}_{2}}\to C{{O}_{2}} \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(Carbon\,\,dioxide) \\ \end{align}\]

(ii) \[\begin{align}   & C{{O}_{2}}+{{H}_{2}}O\to {{H}_{2}}C{{O}_{3}} \\  & \,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,(Carbonic\,\,acid) \\ \end{align}\]