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Name the drying agents: (a) used in drying hydrogen chloride gas.

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Name the drying agents:

(a) used in drying hydrogen chloride gas.

(b) phosphorus pentoxide and calcium oxide are good drying agent but they cannot be used to dry hydrogen chloride gas. Why?

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1 Answer

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(a) Hydrogen chloride is dried by passing through conc. Sulphuric acid.

(b) Phosphorous pentoxide and CaO cannot be used to dry HCl because they react with HCl.

2P2O5+ 3HCl → POCl3 + 3HPO3

CaO + 2HCl → CaCl2 + H2O

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