Fe+2HCl→FeCl2+H2 ;Zn+2NaOH +2H2O= Na2[Zn(OH)4] + H2 илиZn+2NaOH= Na2ZnO2 + H2; Cl2+2NaI→2NaCl+I2 ; Sn+H2SO4→SnSo4+H2 ; Mn+NiCl2→MnCl2 + Ni
Fe+2HCl→FeCl2+H2 ;Zn+2NaOH +2H2O= Na2[Zn(OH)4] + H2 или
Zn+2NaOH= Na2ZnO2 + H2; Cl2+2NaI→2NaCl+I2 ; Sn+H2SO4→SnSo4+H2 ; Mn+NiCl2→MnCl2 + Ni