1. Oxidation and Reduction, Displacement and Rusting.
By the end of this lesson I will be able to:
describe what oxidation and reduction are
Describe what a redox reaction is
Recognise species that have undergone oxidation and reduction
Write word and symbol equations for displacement reactions
Explain why rusting is a redox reaction and how rusting can be prevented

2. Rearrange the letters into words
Nooidaxti
Notciduer
Oxidation
Reduction

3. Oxidation is loss of electrons
E.g. Na  Na+ + e-
Reduction is gain of electrons
E.g. Br e-  2Br-
In a redox reaction something is oxidised and something else is reduced

4. O I L R G
Oxidation Is
Loss
Reduction
Gain

5. Redox reactions can be forced in either direction.
Something is oxidised if it loses electrons.
An oxidising agent takes electrons off something else.
Something is reduced if it gains electrons.
A reducing agent pushes electrons onto something else.

6. Fe turns into Fe2+. Has it been oxidised or reduced
Fe turns into Fe2+. Has it been oxidised or reduced? Explain what happens to the electrons.
Fe2+ turns into Fe. Has it been oxidised or reduced? Explain what happens to the electrons.
Fe2+ turns into Fe3+. Has it been oxidised or reduced? Explain what happens to the electrons.
Fe3+ turns into Fe2+. Has it been oxidised or reduced? Explain what happens to the electrons.
Cl2 turns into 2Cl–. Has it been oxidised or reduced? Explain what happens to the electrons.
2Cl– turns into Cl2. Has it been oxidised or reduced? Explain what happens to the electrons.

7. Worksheet C6b 3 – Redox reactions answers
Oxidised, it has lost (two) electrons
Reduced, it has gained (two) electrons
Oxidised, it has lost (one) electron
Reduced, it has gained (one) electron
Reduced, it has gained electrons (one per atom, two per molecule)
Oxidised, (each chloride ion) has lost (one) electron