Ca(ClO)2+CO2+H2O===CaCO3↓+2HClO
（漂白粉的漂白原理）
Cl+SO2+2H2O===2HCl+H2SO4
SO2+X2+2H2O===H2SO4+2HX
(SO2與鹵素溶液反應(yīng),X表示“鹵素”如：Cl2,Br2,I2)
H2S+Pb(2+)+2CH3COO(-)===PbS↓+2CH3COOH
(濕潤的醋酸鉛試紙檢驗(yàn)硫化氫)
4NO2+O2+2H2O===4HNO3
(NO2和O2混合通入水中)
4NO+3O2+2H2O===4HNO3
(NO和O2混合通入水中)
NO2+NO+2NaOH===2NaNO2+H2O
(NO2,NO中通入過量NaOH)
Si+2NaOH+H2O===Na2SiO3+2H2↑
(Si和NaOH溶液反應(yīng))
Na2SiO3+2HCl+H2O===2NaCl+H2SiO4↓
(Na2SiO3中通入HCl)
Zn+MnO2+H2O===ZnO+Mn(OH)2
(鋅錳干電池反應(yīng)原理)
Pb+PbO2+2H2SO4===2PbSO4+2H2O
(鉛蓄電池反應(yīng)原理)
2NaBr+2H2SO4(濃)+MnO2===Na2SO4+MnSO4+Br2↑+2H2O
H2SO3+I2+H2O===2HI+H2SO4