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Video Tutorial on Redox Half Equation, Oxidation, Reduction, Oxidizing and Reducing Agent. http://lawrencekok.blogspot.com. Prepared by Lawrence Kok. Redox reaction - TWO HALF equation, oxidation/reduction. Reducing Agent. Oxidizing Agent. Zn (RA) with Fe 3+ (OA).

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  1. Video Tutorial on Redox Half Equation, Oxidation, Reduction, Oxidizing and Reducing Agent. http://lawrencekok.blogspot.com Prepared by Lawrence Kok

  2. Redox reaction - TWO HALF equation, oxidation/reduction Reducing Agent Oxidizing Agent • Zn (RA) with Fe 3+ (OA) • SO2 (RA) with Fe 3+ (OA)

  3. Redox reaction - TWO HALF equation, oxidation/reduction Reducing Agent Oxidizing Agent • Zn (RA) with Fe 3+ (OA) Half equations • SO2 (RA) with Fe 3+ (OA) Half equations

  4. Redox reaction - TWO HALF equation, oxidation/reduction • KI (RA) with Fe 3+ (OA) • H2S (RA) with Fe 3+ (OA) • SO32- (RA) with Fe 3+ (OA)

  5. Redox reaction - TWO HALF equation, oxidation/reduction • KI (RA) with Fe 3+ (OA) Half equations • H2S (RA) with Fe 3+ (OA) Half equations • SO32- (RA) with Fe 3+ (OA) Half equations

  6. Balancing redox reaction between MnO4-(OA) with SO2 (RA) in acidic medium Reduction half equation Oxidation half equation

  7. Balancing redox reaction between MnO4-(OA) with SO2 (RA) in acidic medium Reduction half equation Oxidation half equation Redox Equation +

  8. Balancing redox reaction between Cr2O72-(OA) with NO2 - (RA) in acidic medium Reduction half equation Oxidation half equation

  9. Balancing redox reaction between Cr2O72-(OA) with NO2 - (RA) in acidic medium Reduction half equation Oxidation half equation Redox Equation +

  10. Balancing redox reaction between MnO4-(OA) with Fe 2+ (RA) in acidic medium Reduction half equation Oxidation half equation

  11. Balancing redox reaction between MnO4-(OA) with Fe 2+ (RA) in acidic medium Reduction half equation Oxidation half equation Redox Equation +

  12. Balancing redox reaction between CIO3-(OA) with I-(RA) in acidic medium Reduction half equation Oxidation half equation

  13. Balancing redox reaction between CIO3-(OA) with I-(RA) in acidic medium Reduction half equation Oxidation half equation Redox Equation +

  14. Balancing redox reaction between Cr2O72-(OA) with Fe 2+ (RA) in acidic medium Reduction half equation Oxidation half equation

  15. Balancing redox reaction between Cr2O72-(OA) with Fe 2+ (RA) in acidic medium Reduction half equation Oxidation half equation Redox Equation +

  16. Balancing redox reaction between HNO3(OA) with Fe 2+ (RA) in acidic medium Reduction half equation Oxidation half equation

  17. Balancing redox reaction between HNO3(OA) with Fe 2+ (RA) in acidic medium Reduction half equation Oxidation half equation Redox Equation +

  18. Disproportional Reaction • Redox reaction where same substance is both oxidised and reduced at the same time • Substance acts as oxidizing and reducing agent • Decomposition of Nitric (III) acid to Nitric (II) acid 3HNO2 → HNO3 + 2NO + H2O • Decomposition of Copper (I) sulphate to Copper (II) sulphate and Copper Cu2(SO4) → CuSO4 + Cu • Decomposition of Potassium chlorate (V) acid to Potassium chlorate (VII) and Potassium chloride KCIO3 → KCIO4 + KCI

  19. Disproportional Reaction • Redox reaction where same substance is both oxidised and reduced at the same time • Substance acts as oxidizing and reducing agent • Decomposition of Nitric (III) acid to Nitric (II) acid 3HNO2 → HNO3 + 2NO + H2O • Decomposition of Copper (I) sulphate to Copper (II) sulphate and Copper Cu2(SO4) → CuSO4 + Cu • Decomposition of Potassium chlorate (V) acid to Potassium chlorate (VII) and Potassium chloride KCIO3 → KCIO4 + KCI

  20. Use Half equation to write Redox equation 1. Magnesium reducing Lead ions to Lead metal 2. Sulphur dioxide oxidised to sulphate by reducing iodine to iodide 3. Iron (II) oxidised to iron (III) by hydrogen peroxide 4. Zinc reducing dichromate ion to chromium (III)

  21. Use Half equation to write Redox equation 1. Magnesium reducing Lead ions to Lead metal Redox equation 2. Sulphur dioxide oxidised to sulphate by reducing iodine to iodide Redox equation 3. Iron (II) oxidised to iron (III) by hydrogen peroxide Redox equation 4. Zinc reducing dichromate ion to chromium (III) Redox equation

  22. Which is Oxidizing and Reducing Agent ? 1 (Cr2O7) 2- + 8 H+ + 3(NO2) - + 3H2O → 2Cr 3+ + 7H2O + 3(NO3) - 2 5As2O3 + 2 MnO4- + 16H + → 2Mn 2+ + 5 As2O5 + 8 H2O 3 5H2O2 + 2MnO4- + 6H + → 2Mn 2+ + 5O2 + 8H2O

  23. Which is Oxidizing and Reducing Agent ? 1 (Cr2O7) 2- + 8 H+ + 3(NO2) - + 3H2O → 2Cr 3+ + 7H2O + 3(NO3) - 2 5As2O3 + 2 MnO4- + 16H + → 2Mn 2+ + 5 As2O5 + 8 H2O 3 5H2O2 + 2MnO4- + 6H + → 2Mn 2+ + 5O2 + 8H2O

  24. Video on Redox half reactions Redox reaction on gallium beating heart Oxidizing agent using potassium chlorate IB Chemistry Redox half reaction Redox turning copper to silver to gold Balancing Redox reaction

  25. Acknowledgements Thanks to source of pictures and video used in this presentation Thanks to Creative Commons for excellent contribution on licenses http://creativecommons.org/licenses/ Prepared by Lawrence Kok Check out more video tutorials from my site and hope you enjoy this tutorial http://lawrencekok.blogspot.com

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