Chemistry ace

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Chemistry ace

  1. 1. Mervin Lim 3B2(12)CHEMISTRY ACEOXIDATION AND REDUCTIONREDOX
  2. 2. What is a redox?A redox is concerned with net electron flow to and from a defined centre during a chemical reaction.
  3. 3. Defined Centres Atom Atomic ion Molecule Molecular ion Multifunctional molecule
  4. 4. What is a redox? RedoxReduction Oxidation
  5. 5. Aspects Redox Oxidation ReductionOxidizing Agent Reducing AgentLose electrons Gain electrons
  6. 6. How to memorise? “LEO says GER”Lose Electrons is Oxidation Gain Electrons is Reduction
  7. 7. Sum up1. Oxidation  loss of electrons2. Reduction  gain of electrons3. Oxidizing agent  Gains electrons during reaction and therefore reduced reaction4. Reducing agent  Loses electrons during reaction and is therefore oxidized during reaction5. Oxidized form  Form of molecule lacking electrons6. Reduced form  Form of molecule having electrons
  8. 8. How can oxidation of a defined centre be changed? 1) Single Electron Transfer (SET) -To the defined centre (reduction) or from the defined centre (oxidation) E.g. Iron
  9. 9. How can oxidation of a defined centre be changed? 2) Reversal of bond polarization at defined centres E.g. Carbon
  10. 10. 3 Types of Redox Reaction1st :Gain of electrons is reduction,Loss of electrons is oxidation
  11. 11. 3 Types of Redox Reaction2nd :Gain of hydrogen* is reduction,Loss of hydrogen* is oxidation*or other electro positive element
  12. 12. 3 Types of Redox Reaction2nd :Gain of hydrogen* is reduction,Loss of hydrogen* is oxidation*or other electro positive element
  13. 13. 3 Types of Redox Reaction3rd :Loss of oxygen* is reduction,Gain of oxygen* is oxidation*or other electro positive element
  14. 14. Classification of Redox Types Single Electron Transfer Electron Donor Agent Hydride Complex Agent Lewis Acid Hydride Donor Agent Hydrogen Agent Dissolved Metal Agent Miscellaneous Agent
  15. 15. That is all Thank you

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