Some Basic Concept in Chemistry Formula - Practice Questions & MCQ

Heating of Carbonates

• Group II metal carbonates like MgCO₃, CaCO₃  and other bivalent metal carbonates (PbCO₃, ZnCO₃) liberate CO₂ on heating and leave their oxide as residue

• Group 1 metal carbonates  like Na₂CO₃, K₂CO₃ are resistant to decomposition upon heating (except Li)

Heating of Bicarbonates

• Group II metal bicarbonates like Ca(HCO₃)₂ liberate CO₂ and H₂O on heating and leave their oxide as residue​​​​​​​​​

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• Group I metal bicarbonates like NaHCO₃ liberate CO₂ and H₂O on heating and leave their carbonate as residue

Acid-Base Titrations involving Multiple acids or bases

Sometimes, the problems involving neutralisation reactions involve more than one acids or bases. In such cases too, the underlying principle is the law of equivalence. i.e. 

meq. of acid 1 + meq. of acid 2 + ....... = meq of base 1 + meq. of base 2 + .......