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**Molecular formula:** Na₂CO₃
**Molar mass:** 105,988 g/mol
**Information:** Sodium carbonate (soda) is, unlike most carbonates in water, a well-soluble, crystalline, white powder. Its aqueous solution is alkaline. Sodium carbonate from aqueous solutions crystallizes as sodium carbonate decahydrate Na₂CO₃·10H₂O (crystalline soda). It is an ionic compound containing a sodium cation Na and carbonate anion CO₃²⁻.
**Use:** It is used as a water softener and in the manufacturing of glass.
