During a decomposition reaction, one large molecule decomposes into two or more small molecules. Na2CO3 is the chemical formula for sodium carbonate. Sodium carbonate decomposes into two molecules including sodium oxide and carbon dioxide. Carbon dioxide is evolved during the decomposition of sodium carbonate. The chemical equation for the reaction is.
Na2CO3(s) ------> Na2O(s) + CO2(g)
Na2CO3(s) ------> Na2O(s) + CO2(g)
