Learning Objective To be able to Describe the

Learning Objective To be able to: Describe the oxidation and reduction of metals Key Words: Oxygen, reduction, oxidation

01 February 2022 REDOX Reactions Date and title in books. You need a pen, pencil & ruler. Starter Activity – 5 minutes Exam question

Learning Outcomes (F) Target 9 -1 State that oxidation is gain of oxygen and reduction is loss of oxygen (F/H) Target 4 -9 Write word equations for oxidation and reduction reactions of metals (H) Target 5 -9 Explain oxidation in terms of the loss and gain of electrons Extension: Application of Knowledge Target 8/9 Write a balanced symbol equation for the reduction of metal oxides and the oxidation of metals

Redox Reactions • A redox reaction refers to the gain or loss of oxygen. • Oxidation is the gain of oxygen • Reduction is the loss of oxygen

Reactivity Series • How well a metal oxidises or reduces is related to its reactivity. • The more reactive, the more likely it is to oxidise or reduce. • Question: What might we use to find out about reactivity?

The Reactivity Series Increasing reactivity potassium sodium calcium magnesium aluminium How reactive the metal it determines how easy it is to oxidise or reduce. (carbon) zinc iron lead copper silver gold Which metal is more likely to oxidise or reduce? Potassium or Magnesium?

Oxidation • Oxidation is the GAIN of oxygen. • Example: Zinc + oxygen Zinc oxide 2 Zn + O 2 2 Zn. O

Reduction • Reduction is the LOSS of oxygen For example; iron oxide can be reduced: Iron Oxide Iron + Oxygen 2 Fe. O 2 Fe + O 2

Activity 1 • Complete the sheet. • Are the equations showing oxidisation or reduction? • Can you spot a pattern?

Activity 2 • Complete the REDOX equations sheet. • As you go further down they get harder and move towards the higher paper questions……

Electrons • OILRIG • Oxidation Is the Loss of electrons • Reduction Is the Gain of electrons