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  • FREE 5-MIN Notes
    • 1. Experimental Techniques
    • 2. Methods of Purification
    • 3. Separation Techniques
    • 4. Qualitative Analysis
    • 5. Kinetic Particle Theory
    • 6. Atomic Structure
    • 7. Elements, Compounds, Mixtures
    • 8. Ionic Bonding
    • 9. Covalent Bonding
    • 10. Mole Concept
    • 11. Electrolysis
    • 12. Energy Changes
    • 13. Speed of Reaction
    • 14. Redox
    • 15. Acids and Bases
    • 16. Salts
    • 17. Ammonia
    • 18. Periodic Table
    • 19. Metals
    • 20. Air
    • 21. Fuels
    • 22. Organic Chemistry
    • 23. Macromolecules
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14. Redox

Oxidation
  • The gain in oxygen or the loss of hydrogen
  • The increase in oxidation state
  • The loss of electrons of a substance in a chemical reaction.

Reduction
  • The loss in oxygen or the gain of hydrogen
  • The decrease in oxidation state
  • The gain of electrons of a substance in a chemical reaction.

Redox Reactions
  • A redox reaction refers to both oxidation and reduction occurring in the same chemical reaction simultaneously.
  • Types of redox reactions
  1. Metal + Dilute acids
  2. All combustion reactions
  3. Displacement reaction    
  4. Extraction of less reactive metals using Blast furnace.

  • Typical non- redox reactions:
    1. Neutralization
    2. Precipitation
    3. Thermal decomposition of carbonates

Oxidising and Reducing Agents

  • When a substance is reduced, it acts as an oxidising agent. Acidified potassium dichromate(VI) turns from orange to green. Acidified potassium manganate(VII) turns from purple to colourless.
  • When a substance is oxidised, it acts as a reducing agent. Potassium iodide turns from colourless to brown. Hydrogen peroxide produces oxygen.
Next: Acids and Bases
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  • Home
  • More Information
  • Contact Me
  • Blog
  • FREE 5-MIN Notes
    • 1. Experimental Techniques
    • 2. Methods of Purification
    • 3. Separation Techniques
    • 4. Qualitative Analysis
    • 5. Kinetic Particle Theory
    • 6. Atomic Structure
    • 7. Elements, Compounds, Mixtures
    • 8. Ionic Bonding
    • 9. Covalent Bonding
    • 10. Mole Concept
    • 11. Electrolysis
    • 12. Energy Changes
    • 13. Speed of Reaction
    • 14. Redox
    • 15. Acids and Bases
    • 16. Salts
    • 17. Ammonia
    • 18. Periodic Table
    • 19. Metals
    • 20. Air
    • 21. Fuels
    • 22. Organic Chemistry
    • 23. Macromolecules
  • Free Printables