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Explaing Displacement

Oxidation and Reduction

  • Oxidation is the loss of electrons
  • Reduction is the gaining of electrons

  • When an atom gains oxygen, it gives the electrons to oxygen
  • When oxygen is taken away from the atom, the electrons are being given back to the atom

REDOX Reaction

  • When reduction and oxidation happen in the same reaction

Ionic Equation

  • A chemical equation showing how postively charged ions join with negatively charged ions to form a compound

Example

  • A balanced equation:
    • Cl2(aq) + 2K+(aq) + 2Br-(aq) -> 2K+(aq) + 2Cl-(aq) + Br2(aq)

  • Ionic equation:
    • We removed the ions that did not change, in this case, the potassium as it doesn't change charge or amount, it is considered a spectator ion which we remove in the final result
    • Cl2(aq) + 2Br-(aq) -> 2Cl-(aq) + Br2(aq)

  • Half equation:
    • Stole the ionic balanced equation
    • Cl2(aq) + 2e- -> 2Cl-(aq) (reduction, chlorine gains electrons)
    • 2Br-(aq) -> Br2(aq) + 2e- (oxidisation, bromine lost electrons)