Standard mechanisms

• Oxidation of Fe2+ to Fe3+

  MnO4- + 8H+ + 5Fe2+ -> Mn2+ + 5Fe3+ + 4H2O
• Reduction of Fe3+ to Fe2+

  2Fe3+ + 2I- -> 2Fe2+ + I2
• Reduction of Cr2O7- to Cr3+?


  Cr2O7- + 14H+ + 3Zn -> 2Cr3+ + 7H2O + 3Zn2+
• Oxidation of Cr3+ to CrO42-?

  3H2O2 + 2Cr3+ + 10OH- -> 2CrO42- + 8H2O
• Reduction of Cu2+ to Cu+?

  2Cu2+ + 2I- -> 2Cu+ +I2