SO3+H2O→H2SO4 (Axit sunfuric)
Na2O+H2O→2NaOH (Natri hidroxit)
CaO+H2O→Ca(OH)2 (Canxit hidroxit)
CO2+H2O→H2CO3 (Axit cacbonic)
oxit tan trong nước là SO3, Na2O, CaO,CO2
SO2+H2O--->H2SO3: axit sunfit
Na2O+H2O-->2NaOH--->natri hidroxxit
CaO+H2O--->Ca(OH)2-->Canxi hidroxxit
CO2+H2O--->H2CO3-->axit cacbonic