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- NaHCO3 , BaCO3 , Na2CO3
- Ba(HCO3)2 , NaHCO3 , Ca(HCO3)2
- Ca(HCO3)2 , Ba(HCO3)2 , MgCO3 .
- Mg(HCO3)2 , Ba(HCO3)2 , CaCO3