Why is HCl predominantly covalent in the gaseous state but is ionic in

1.	Why is HCl predominantly covalent in the gaseous state but is ionic in squeous solution ?
Answer» In HCl, the electronegativity difference in Cl and H atoms (3.0-2.1) is 0.9. Therefore, it is predominantly covalent in the gaseous state. When dissoved in water which is of polar nature, there an attraction between the atoms of the acid and polar `H_(2)O` molecules. Energy is released dureing attraction. This helps in the ionisation of the acid. Therefore, `C Cl_(4)` molecule, C-Cl bonds are polar but molecule is non ploar in aqueous solution.

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Why is HCl predominantly covalent in the gaseous state but is ionic in squeous solution ?

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