Redox Equations

• Purple to Colourless

  MnO4- + 8H+ + 5e- > Mn2+ + 4H2O
• Orange to Green

  Cr2O72- + 14H+ + 6e- > 2Cr3+ + 7H2O
• No colour change

  2S2O32- > S4O62- + 2e-
• Pale Green to Pale Orange

  Fe2+ > Fe3+ + e-
• Brown to Colourless

  I2 + 2e- > 2I-