Question

Why HCl gas caanot be dried by using dehydrating agent like P2O5, CaO ect?

Answer 1

$\huge \underline \mathcal \red {Answer}$

Hydrogen chloride is acidic whereas quick lime is basic, so they will react with each other hence quick lime can not be used to dry hydrogen chloride.

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Answer 2

HCl gas cannot be dried by using dehydrating agent like P2O5, CaO because P2O5, CaO are basic in nature.

Explanation:

Hydrogen chloride

• It is acidic and quick lime is basic, so the acid and base react each other.
• CaO and P2O5 are basic, so HCl will react with them and formed as water and salt.

Phosphorus pentoxide

• It is a chemical compound of molecular formula P4O10 and P2O5 is the empirical formula.
• Anhydrous phosphoric acid of crystalline solid is white in color. It is a dehydrating agent.

Calcium oxide  

• It is a basic drying agent. It is possible for dehydrating basic gases and neutral, low-boiling alcohols, amines, and ethers.

To learn more;

1. https://brainly.in/question/12082384
2. https://brainly.in/question/747136