Ва(ОН)2 + 2НCl= ВаCl2 + 2Н2O
Ва²⁺+2ОН⁻ + 2Н⁺+2Cl⁻= Ва²⁺+2Cl⁻ + 2Н2O
2ОН⁻ + 2Н⁺⁻= 2Н2O
H2SO4+ Ba(NO3)2=2HNO3+BaSO4↓
H⁺+SO4²⁻+ Ba²⁺+2NO3⁻=2H⁺+2NO3⁻+BaSO4↓
SO4²⁻+ Ba²⁺=BaSO4↓
CuSO4+2NaOH=Cu(OH)2↓+Na2SO4
Cu²⁺+SO4²⁻+2Na⁺+2OH⁻=Cu(OH)2↓+2Na⁺+SO4²⁻
Cu²⁺+2OH⁻=Cu(OH)2↓
3KOH+H3PO4=K3PO4+3H2O
3K⁺+3OH⁻+3H⁺+PO4³⁻=3K⁺+PO4³⁻+3H2O
3OH⁻+3H⁺=3H2O
Na2SO3+2HCl=2NaCl+SO2↑+H2O
2Na⁺+SO3²⁻+2H⁺+2Cl⁻=2Na⁺+2Cl⁻+SO2↑+H2O
SO3²⁻+2H⁺=SO2↑+H2O
AlCl3+H3PO4=AlPO4↓+3HCl
Al³⁺+3Cl⁻+3H⁺+PO4³⁻=AlPO4↓+3H⁺+3Cl⁻
Al³⁺+PO4³⁻=AlPO4↓