4CuO=2Cu2O + O2
Cu2+ + 1e− = Cu+
:O2− − 2e− = O2
2 SO2+O2=2 SO3
O + 2e− = O2−
S4+ − 2e− = S6+
2FeBr3 = Br2 + 2FeBr2
Na2S + CuCl2 = 2NaCl + CuS
2 H2S+ 3 O2=2SO2+2 H2O
S2− − 6e− = S4+
4 Ag+ 2H2S+O2= 2Ag2S+ 2H2O
O + 2e− = O2−Ag − 1e− = Ag+1 2
4CuO=2Cu2O + O2
Cu2+ + 1e− = Cu+
:O2− − 2e− = O2
2 SO2+O2=2 SO3
O + 2e− = O2−
S4+ − 2e− = S6+
2FeBr3 = Br2 + 2FeBr2
Na2S + CuCl2 = 2NaCl + CuS
2 H2S+ 3 O2=2SO2+2 H2O
O + 2e− = O2−
S2− − 6e− = S4+
4 Ag+ 2H2S+O2= 2Ag2S+ 2H2O
O + 2e− = O2−Ag − 1e− = Ag+1 2