Chapter : 5. Compounds of Common Use
Properties and Uses of Sodium Carbonate
17. Uses of Sodium Carbonate.
(i) It is used in manufacture of glass, soap, paper and other sodium compounds like borax, caustic soda, etc.
(ii) It is used in softening of hard water.
(iii) It is used as washing soda in laundries.
(iv) It is used as cleaning agent for domestic purposes.
(v) It is used as laboratory reagent.
(vi) It is used in textile and petroleum refining.
(vii) It is used for preparation of carbonate of metals.
(viii) It is used in fusion mixture (Na2CO3 + K2CO3) which helps in qualitative analysis i.e., in preparation of soda extract in case of insoluble salts.
18. Baking Soda (NaHCO3) : Baking soda, chemically is sodium hydrogen carbonate. It is obtained as a first product in Solvay process as shown in reaction (ii). It can also be obtained by passing CO2 gas through aqueous solution of sodium carbonate as shown in reaction (vii).
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