Na2CO3+CO2+H2O=2NaHCO3
2. Sodium carbonate can react with manganese dioxide at high temperature to generate sodium silicate and carbon dioxide.
Na2CO3+SiO2 = high temperature = Na2SiO3+CO2↑ =
3. Sodium carbonate can react with acid to generate sodium salt, water and carbon dioxide.
Na2CO3+2HCl=2NaCl+H2O+CO2↑
Na2CO3+H2SO4=Na2SO4+H2O+CO2↑
4. Sodium carbonate can react with some alkalis to generate new salts and alkalis.
Na2CO3+Ba(OH)2=BaCO3↓+2NaOH
Na2CO3+Ca(OH)2=CaCO3↓+2NaOH
5. Sodium carbonate reacts with some salts to generate two new salts.
Na2CO3+BaCl2=BaCO3↓+2NaCl
Na2CO3+CaCl2=CaCO3↓+2NaCl