CaO+2HCL-->CaCL2+H2O
CaCO3+H2SO4-->CaSO4+H2O+CO2
Al2(SO4)3+3NaOH-->Al(OH)3+Na3SO4
BaCL2+Na2SO4-->2NaCL+BaSO4
CuSO4+2NaOH-->Cu(OH)2+Na2SO4
CaO+H2SO4-->CaSO4+H2O
SO3+2KOH-->K2SO4+H2O
AgNO3+HCL-->AgCL+HNO3
Fe2O3+3H2SO4-->Fe2(SO4)3+3H2O
FeCL3+3NaOH-->Fe(OH)3+3NaCL