K + H2O -> KOH + 1/2 H2
CaO + 2 H2O -> Ca(OH)2 + H2
BaCO3 + 2 HCl -> BaCl2 + CO2 + H2O
Al2O3 + 6 HCl -> 2 AlCl3 + 3 H2
Al2O3 + 2 NaOH -> 2 NaAlO2 + H2O
Zn(OH)2 + 2 NaOH -> Na2ZnO2 + 2 H2O
CaO +2 HCl -> CaCl2 + 2O
NaOH + HCl -> NaCl + H2O
SO2 + NaOH ->NaHSO3
2 NaOH + SO2 -> Na2SO3 + H2O
Zn(OH)2 + 2 HCl -> ZnCl2 + 2 H2O
2 K + 2 HCl -> 2 KCl + H2