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Sodium Carbonate or Soda Ash

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Sodium Carbonate Soda Ash or Washing Soda
Na2CO3

Sodium carbonate or soda ash is a sodium salt of carbonic acid. It is in the form of white crystalline compound with a cooling alkaline taste. It is found in the ashes of many plants. Artificially, it is produced in large quantities from common salt.

Physical and Chemical Properties of Sodium Carbonate

Appearance White powder or granules
Odor Odorless
Solubility 45.5 g/100 ml water @ 100°C (212°F)
Specific gravity 2.53
pH 11.6 Aqueous solution
% Volatiles by volume @ 21C (70F) 0
Boiling point Decomposes
Melting point 851°C (1564°F)

Occurrences of Sodium Carbonate

Though sodium carbonate is soluble in water, but it can occur in arid regions naturally, particularly in the mineral deposits, which are formed when seasonal lakes evaporates. From the dry lake bottoms in Egypt, deposits of mineral natron (combination of sodium carbonate and sodium bicarbonate) have been mined since ancient times, at the time when natron was used in the preparation of mummies and in the early manufacture of glass.

Sodium carbonate has three known form of hydrates. They are:

Uses of Sodium Carbonate

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