HCl+KOH=KCl+H2O
H2SO4+Cr(OH)3=CrSO4+2H2O
SiO2+2NaOH=Si(OH)2 + 2NaO
2Al(OH)3+3HCl=Al2Cl2+ 3H2O
FeCl2+KOH=FeOH+KCl
3Ca(NO₃)₂ + 2H₃PO₄ => Ca₃(PO₄)₂ + 6HNO₃