Question

During the preparation of hydrogen chloride gas on a humid day, the gas is usually passed through the guard tube containing calcium chloride. The role of calcium chloride taken in the guard tube is to​

Answer 1

Answer:

to dry the hydrogen chloride gas

Answer 2

Anhydrous CaCl2 is a commonly used drying agent, it removes moisture from the moist HCl gas without chemically reacting with it. It is a slightly acidic salt and does not react with acidic moist HCl gas. Hence it is used as a drying agent to dry moist HCl gas.