Sodium Carbonate - Na2CO3

What is Sodium Carbonate?

Sodium carbonate is an inorganic chemical compound. Sodium carbonate is what is commonly known as Soda ash. Soda ash is extracted from trona. Trona is a double salt containing sodium carbonate and sodium hydrogen carbonate formed as a result of the series of evaporation processes taking place at lakes.

Sodium Carbonate Formula

Sodium carbonate is a diazonium salt of carbonic acid with chemical formula Na2CO3. It is also known as Soda crystals, soda ash, washing soda. This inorganic compound is water-soluble and when dissolved in water, it forms carbonic acid and sodium hydroxide. In its pure form, it is white powder and odourless. It is a strong base and acts as an antacid.

Sodium carbonate can be produced by four processes – “Solvay process, Labnac process, Dual-process, Electrolytic process”. Since it is a weak acid it is slightly soluble in ethanol and insoluble in alcohol. One of the important uses of Na2CO3 is as a water softener. pH is about 10.52

Properties of Sodium Carbonate – Na2CO3

Na2CO3 Sodium Carbonate
Molecular Weight/ Molar Mass 105.9888 g/mol
Density 2.54 g/cm³
Boiling Point 1,600 °C
Melting Point 851 °C

Sodium Carbonate Structure – Na2CO3


Sodium Carbonate Structure

Uses of Sodium Carbonate (Na2CO3)

The uses of sodium carbonate are listed below.

  • It is used in the manufacture of detergents, soaps, paper.
  • It is used in as a wetting agent in brick industry
  • It is used as an abrasive and foaming agent in toothpaste
  • It is used as a pH modifier
  • It is used as water softener –  Hard water which consists of magnesium and calcium ions are precipitated by carbonate

Learn more about the chemical behaviour and importance of Na2CO3 with the expert faculties at BYJU’S.

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