2Ca+O2= 2CaO oxid de calciu;
S+O2= SO2 dioxid de sulf
4Al+3O2= 2Al2O3
oxizii acizi (nemetalici) in reactia cu apa => acizi
oxizii bzici (metalici) in reactia cu apa => baze
CO2...H2CO3 acid carbonic
Al203...Al(OH)3 hidroxid de aluminiu
CuO...Cu(OH)2 hidroxid de cupru
SO3...H2SO4 acid sulfuric