redox

• redox reactions involve simultaneous oxidation and reduction reactions ( gain and loss of oxygen )
• Oxidation

  • Gain of oxygen
  • loss of electrons
  • increase in oxidation number
• Reduction:

  • Loss of oxygen
  • Gain of electrons
  • decrease in oxidation number
• oxidising agent: substance that oxidises another substance and is itself reduced
• reducing agent : substance that reduces another substance and is itself oxidised