agentii reducatori sunt substantele care contin specii atomice ce sufera proces de oxidare, prin cedare de e-
a)
-2 0 -1 0
H2S + Cl2 --> 2HCl + S
S⁻²_-2e-_> S⁰ oxidare (ag. reducator) H2S
b)
-2 0 0 -2
2H2S + 5O2 --> S + 2H2O
S⁻²_-2e-_> S⁰ oxidare (ag. reducator) H2S
c)
-1 0 -1 0
2KI + Br2 --> 2KBr + I2
2I⁻_-2e-__> I2⁰ oxidare (ag. reducator) KI
d)
+1 0 +2 0
2AgNO3 + Mg --> Mg(NO3)2 + 2Ag
Mg⁰_-2e__> Mg⁺² oxidare (ag. reducator) Mg
