NaHCO3 + NaOH = Na2CO3 + H2O
CO2 + NaOH = NaHCO3, CO2 + 2NaOH = Na2CO3 + H2O
Zn(OH)2 + 2NaOH = Na2[Zn(OH)4]
NaHCO3 + NaOH = Na2CO3 + H2O
CO2 + NaOH = NaHCO3, CO2 + 2NaOH = Na2CO3 + H2O
Zn(OH)2 + 2NaOH = Na2[Zn(OH)4]