Question

How can chlorine gas be prepared in the laboratory?

1) By the reaction of hydrochloric acid with manganese(IV) oxide
2) By the reaction of hydrochloric acid with sodium chloride
3) By the reaction of hydrochloric acid with sulfuric acid
4) By the reaction of hydrochloric acid with nitric acid

Answer 1

Chlorine gas can be prepared by reacting hydrochloric acid with manganese(IV) oxide which results in chlorine gas and manganese(II) chloride as products.

Step-by-step explanation:

Chlorine gas can be prepared in the laboratory by the reaction of hydrochloric acid with strong oxidizing agents. One common method involves the reaction of hydrochloric acid with manganese(IV) oxide (MnO2). The chemical reaction proceeds as follows:

MnO2 (s) + 4HCl (aq) → MnCl2 (aq) + Cl2 (g) + 2H2O (l)

This reaction results in the release of chlorine gas (Cl2). It should be noted that reactions with sulfuric acid, nitric acid, or sodium chloride do not typically produce chlorine gas in the laboratory setting. Using manganese(IV) oxide is a practical and efficient method for generating chlorine gas.