Question

why hcl is not dried by common drying agents like P2O5 or CaO​

Answer 1

Explanation:

They react as shown in the image. ... phosphorus pentoxide can dry the HCl gas, for they both are axidic. ... Because they react with P2O5 and CaO and the HCl gas ...

Answer 2

HCl is not right by common drying agents like P2O5 or CaO because -

• The HCl is highly reactive chemical compound and it easily reacts with the chemical compounds like the phosphorus pentoxide or the calcium oxide.

• When the HCl reacts with phosphorus pentoxide,the metaphosphoric acid and phosphoryl chloride are generated.

P2O5 + HCl ---> HPO3 + POCl3.

• When the HCl reacts with calcium oxide,the calcium chloride salt and water are produced.

CaO + HCl ---> CaCl2 + H2O

• So,if we use either P2O5 or CaO,the main substance HCl will be converted into something else. That's why P2O5 or CaO are not used.