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Question

What happens when hydrogen chloride gas is dissolved in water?


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Solution

Hydrogen chloride gas

  • The gas hydrogen chloride HCl contains hydrogen and chlorine atoms.
  • Due to the large electronegativity difference between hydrogen and chlorine, it is considered a polar compound.
  • Its polar nature makes it water-soluble.

Hydrogen chloride gas dissolved in water

  • When hydrogen chloride gas is dissolved in water, an acidic solution is formed due to the generation of hydronium H3O+ ions.
  • The reaction is as follows:
  • HClaqHydrochloricacid+H2OlWaterH3O+aqHydroniumion+Cl-aqChlorideion

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