P2O5+6NaOH(изб)=2Na3PO4+3H2O, P2O5 + 6OH- = 2PO4³⁻ + 3H2O
Fe(OH)2+2HNO3=Fe(NO3)2+2H2O, 2OH⁻+2H⁺=2H2O
(NH4)2SO4+2KOH=K2SO4+2NH3+2H2O, 2NH4⁺+2OH⁻=2NH3+2H2O
Ca(OH)2+CO2=CaCO3+H2O, Ca²⁺+OH⁻+CO2=Ca²⁺+CO3²⁻+H2O
3Ba(OH)2+2Fe(NO3)3=3Ba(NO3)2+2Fe(OH)3, 6OH⁻+2Fe³⁺=2Fe(OH)3
2CuOH=Cu2O+H2O, 2Cu⁺+2OH⁻=Cu2O+H2O