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Explain properties of sodium carbonate. |
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Answer» Solution : Sodium carbonate is a white CRYSTALLINE solid which exists as a decahydrate, `Na_(2)CO_(3)*10H_(2)O`.This is also called washing soda. It is READILY soluble in water. On heating, the decahydrate loses its water of crystallization to FORM monohydrate. Above 373K, the monohydrate becomes completely anhydrous and changes to a white powder called soda ash. `Na_(2)CO_(3)*10H_(2)O overset(375K)to Na_(2)CO_(3)*H_(2)O+9H_(2)O` `Na_(2)CO_(3)*H_(2)O overset(gt 373K)to Na_(2)CO_(3)+H_(2)O` Carbonate part of sodium carbonate gets hydrolysed by water to form an ALKALINE solution. `CO_(3)^(2-) +H_(2)O to HCO_(3)^(-)+HO^(-)` |
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