1. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Do Now (5 min):
1. The law of conservation of mass states that… (1)
2. Explain why, if a gas is produced in a reaction, it might appear
like there has been a loss of mass. (2)
3. Name the type of bonding in each of the diagrams below: (3)
a. b. c.
4. 26g of magnesium react with oxygen in the air to produce 47g
of magnesium oxide. Calculate the mass of oxygen involved in
the reaction. (2)
5. Convert 132.5kJ into joules. (1)
Challenge: Describe a method of collecting a gas.
2. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Do Now Answers (5 min):
1. Matter cannot be either created or destroyed.
2. The gas may escape into the air/surroundings ; its
mass will therefore not be recorded by a balance.
3. Name the type of bonding in each of the diagrams
below: (3)
a. Metallic b. Covalent c. Ionic
4. 47-26 = 21g (one mark for units in final answer) (2)
5. 132.5 kJ x 1000 = 132500 J (1)
Challenge: One method of collecting a gas in a reaction would be
to place a balloon over the mouth of the test tube. This would trap
the gas, preventing it from moving out into the air/surroundings.
3. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
40%
• Define oxidation.
50%
• Define reduction.
60%
• Write word (and symbol)
equations for the reactions
of metals with oxygen.
14. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Define oxidation. The addition of oxygen to an
element and the loss of
electrons.
Define reduction. The removal of oxygen from an
element and the gain of
electrons.
metal + oxygen metal oxide
In this reaction:
metal + oxygen metal oxide
The metal has been oxidised.
In this reaction:
copper oxide + carbon copper + carbon
dioxide
2 CuO (s) + C (s) → 2 Cu (s) + CO2 (g)
The copper has been reduced &
the carbon has been oxidised.
Look, cover, write, check
15. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Define reduction. The addition of oxygen to an
element and the loss of
electrons.
Define oxidation. The removal of oxygen from an
element and the gain of
electrons.
metal + oxygen metal oxide
In this reaction:
metal + oxygen metal oxide
The metal has been oxidised.
In this reaction:
copper oxide + carbon copper + carbon
dioxide
2 CuO (s) + C (s) → 2 Cu (s) + CO2 (g)
The copper has been reduced &
the carbon has been oxidised.
Spend 2 minutes quizzing
the person next to you.
If their answer is perfect, let
them ask you a question, if
not, correct them and ask
them to repeat the answer.
16. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Recall Quiz: (5 mins)
1. Oxidation describes the process of an element
(gaining/losing) oxygen, while reduction occurs when…
2. What is name of the product formed when a metal reacts with
oxygen?
3. The word equation for the oxidation of magnesium is:
magnesium + _____ _____ ____
4. If a reaction produces pure iron from iron oxide, we can say
that the element has been…
17. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Recall Quiz Answers: (5 mins)
1. Oxidation describes the process of an element gaining
oxygen, while reduction occurs when an element loses
oxygen.
2. When a metal reacts with oxygen, it undergoes oxidation to
produce a metal oxide
3. magnesium + oxygen magnesium oxide
4. If a reaction produces pure iron from iron oxide, we can say
that the element has been reduced.
18. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – I Do, We Do
Write the word equation for each metal reacting with oxygen.
iron magnesium
19. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – I Do, We Do
Write the word equation for each metal reacting with oxygen.
iron magnesium
iron + oxygen iron oxide
20. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – I Do, We Do
Write the word equation for each metal reacting with oxygen.
iron magnesium
iron + oxygen iron oxide magnesium + oxygen
magnesium oxide
21. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – You Do
Write down word equations for the reactions of each of the metals
below with oxygen. Challenge: Write the symbol equations for Q1,3,4.
1. potassium
2. lead
3. sodium
4. calcium
5. silver
6. gold
22. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – You Do Answers
Write down word equations for the reactions of each of the metals
below with oxygen.
1. potassium + oxygen potassium oxide
2. lead + oxygen lead oxide
3. sodium + oxygen sodium oxide
4. calcium + oxygen calcium oxide
5. silver + oxygen silver oxide
6. gold + oxygen gold oxide
23. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Application Task – You Do Answers
1. 4K + O2 2K2O
3. 4Na + O2 2Na2O
4. 2Ca + O2 2CaO
24. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Exit ticket:
1. Write the name of the element which is oxidised in the
following reactions: (2)
a. beryllium + oxygen beryllium oxide
b. lithium + oxygen lithium oxide
2. Write the word and symbol equation for the oxidation of iron
(III). (2)
3. What is the name for the removal of an electron from an
element? (1)
25. Key terms: oxidation, reduction, metal oxides, electrons
Metals and Oxygen
LO: Describe the reactions of metals with oxygen.
Friday, 24 February 2023
Exit ticket:
1. Write the name of the element which is oxidised in the
following reactions: (2)
a. beryllium + oxygen beryllium oxide
b. lithium + oxygen lithium oxide
2. Write the word and symbol equation for the oxidation iron (III).
Iron + oxygen iron oxide
4 Fe + 3 O2 2 Fe2O3
3. What is the name for the removal of an electron from an
element?
Oxidation
Editor's Notes
Script:
We’ve learned what chemical reactions are, and how to write them correctly. We’re now going to start looking at some specific examples of chemical reactions. Today, we’ll be looking at the reactions of metals with oxygen, and the terms oxidation and reduction.
In a chemical reaction, oxygen can either be added to an element, or removed from an element.
Oxidation is the addition of oxygen to an element. In this example, the magnesium is gaining oxygen, so the magnesium is being oxidised. To gain an oxygen, magnesium must lose electrons. So oxidation is also the loss of electrons.
Reduction is the removal of oxygen from an element. In this example, the copper is losing oxygen, so the copper is being reduced. To lose an oxygen, copper must gain electrons. So reduction is also the gain of electrons.
