Na2O-NaOH-NaHSO4-Na2SO4
В) Na2O + H2O = 2NaOHNaOH + H2SO4 = NaHSO4 + H2ONaHSO4 + NaOH = Na2SO4 + H2ONa2SO4 =(t) Na2O + SO3г) СaCO3 =(t) CaO + CO2CaO + H2O = Ca(OH)2Ca(OH)2 + 2H2CO3 = Ca(HCO3)2 + 2H2OCa(HCO3)2 =(t) CaO + 2CO2 + H2O