Na2O + H2O ---> 2NaOH (basic) BaO + H2O ---> Ba(OH)2 (basic) CO2 + H2O -- -> H2CO3 (acidic) N2O5 + H2O ---> HNO2 + HNO3 (acidic) P4O10 + H2O ---> H3PO4 (acidic) SO3 + H2O ---> H2SO4 (acidic) Solution Na2O + H2O ---> 2NaOH (basic) BaO + H2O ---> Ba(OH)2 (basic) CO2 + H2O -- -> H2CO3 (acidic) N2O5 + H2O ---> HNO2 + HNO3 (acidic) P4O10 + H2O ---> H3PO4 (acidic) SO3 + H2O ---> H2SO4 (acidic).