A sodium compound is used for removing the permanent hardness of water , identify the compound . How is it prepared from NaCl?
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WASHING SODA (NA2CO3.10H2O) carbon dioxide n ammonia GASes are passed through the brine solution gives NAHCO3 + NH4CL sodium hydrogen carbonate is not soluble in water. NAHCO3 is then filtered and decomposed next toh have NA2CO3 water n carbon dioxide. then NA2CO3 is hydrated to get SODIUM CARBONATE DECAHYDRATED which is washing soda
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