Hydrochloric acid - HCl

What is Hydrochloric acid?

Hydrochloric acid is an inorganic chemical. It is a strong corrosive acid with a chemical formula HCl. It is also known as hydrogen chloride or muriatic acid.

When hydrogen chloride is dissolved in water HCl is formed. It is a simple diatomic molecule. The hydrogen and chlorine atom are connected with a single covalent bond. The bond between them is polar as the chlorine atom is more electronegative when compared with the hydrogen atom.

It is strongly acidic. It is colorless and viscous. It is corrosive and has a distinctively pungent smell. It is widely used as a laboratory reagent and industry. It is used in the processing of leather, production of gelatin. The physical properties such as density, melting point, PH, boiling point depends on the molarity or concentration of HCl.

Hydrochloric acid Structure – HCl

Hydrochloric acid structure

Preparation of Hydrochloric acid – HCl

The readiest means of preparing hydrochloric acid gas consists of the application of heat to its strong aqueous solution, in other words, the spirit of salt or muriatic acid of the shops. This is how it was originally prepared by Priestley; the process however not being instructive as regards the composition of hydrochloric acid.

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Properties of Hydrochloric acid – HCl

HCl Hydrochloric acid
Molecular Weight/ Molar Mass 36.458 g/mol
Appears Transparent liquid
Boiling Point Depends on the concentration
Melting Point Depends on the concentration

HCl Uses (Hydrochloric acid)

  • It is used in the production of chlorides
  • It is used in rubber industries
  • It is used the production of fertilizers
  • It is used in textile industries
  • It is used in the manufacture of dye
  • It is used in the refining of metals
  • It is used in the production of organic compounds like PVC
  • It is used to regulate the PH of solutions
  • It is used in the stimulation of oil production

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To learn more about hydrochloric acid and its reaction with sodium thiosulfate, download BYJU’S – The Learning App.

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