Heating Effect on Carbonate Salts


  1. All carbonates salts except potassium carbonate and sodium carbonate can be decomposed by heat to produce carbon dioxide gas. 
  2. Table below shows the effect of heating on metal carbonate.


Carbonate Salt Equation of The Reaction
Potassium carbonate
Sodium carbonate
 Will not decompose by heat
Calcium carbonate
Magnesium carbonate
Aluminium carbonate
Zinc carbonate
Iron (III) carbonate
Lead(II) carbonate
Copper(II) carbonate
Calcium carbonate
 CaCO3 → CaO + CO2
Aluminium carbonate
 Al2(CO3)3 → Al2O3 + 3CO2
Copper carbonate
CuCO3 → CuO + CO2
Mercury(II) carbonate
Silver carbonate
Aurum(II) carbonate
Silver carbonate
 2Ag2CO3 → 2Ag + 2CO2 + O2
Ammonium carbonate
(NH4)2CO3 → 2NH3 + 2CO2 + H2O

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