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- Na2CO3 , Mg(OH)2 , Ca(HCO3)2 , BaCO3
- MgCO3 , BaCO3 , Ca(HCO3)2 , NaHCO3
- K2CO3 , KOH , MgCO3 , Ca(HCO3)2 .
- NaHCO3 , KHCO3 , Na2CO3 , K2CO3