K2O + H2O = 2KOH
Ba + 2H2O = Ba(OH)2 + H2
2K + 2H2O = 2KOH + H2
CaH2 + 2H2O = Ca(OH)2 + 2H2
Al4C3 + 12H2O = 4Al(OH)3 + 3CH4
ZnO + 2HCl = ZnCl2 + H2O
AlBr3 + KOH = Al(OH)3 + KBr
BaCl2 +H2SO4 = BaSO4+2HCl
AgNO3 + KCl = AgCl + KNO3
ZnCl2 + 2KOH = Zn(OH)2 + 2KCl