5. Sodium carbonate is a raw material in the production of glass, medicines, alkaline surfactants, etc. One of the methods of its industrial production is based on the Solvay method, which is described by the total chemical reaction: 2 NaCl CaCO3→Na2CO3 CaCl2. Sodium chloride does not directly react with calcium carbonate. The Solvay process takes place with the participation of ammonia and includes 5 stages:

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