AIR AND COMBUSTION

Composition of air.

By the end of the lesson, the learner should be able to:



State the composition of air by volume.

Probing questions;
Brief discussion.

TEXT BOOK

K.L.B.
BOOK I
PP. 68-71

AIR AND COMBUSTION

Air and combustion.

By the end of the lesson, the learner should be able to:
Describe an experiment to show percentage of air that supports burning.

Teacher demonstrations;
Discussion;
Worked examples.

Sodium hydroxide solution, candle, gas jar, trough, copper turnings, hard glass tube, glass syringes.

K.L.B.
BOOK I
PP. 68-71

AIR AND COMBUSTION

Active part of air.

By the end of the lesson, the learner should be able to:
Determine percentage of active part of air using copper.

Teacher demonstrations;
Discussion;
Worked examples.

Copper turnings, glass wool, syringes, plastic tubing.

K.L.B.
BOOK I
PP. 68-71

AIR AND COMBUSTION

Rusting.

By the end of the lesson, the learner should be able to:
Identify conditions necessary for rusting.

Group experiments;
Discussion.

Iron

K.L.B.
BOOK I
PP 76-77

AIR AND COMBUSTION

Percentage of air used up during rusting.

By the end of the lesson, the learner should be able to:
Describe an experiment to show percentage of air used up during rusting.

Teacher demonstration;
Questioning;
Discussion.

Iron nails, troughs.

K.L.B.
BOOK I
P. 72

AIR AND COMBUSTION

Preventing rusting.

By the end of the lesson, the learner should be able to:
State methods of preventing rusting.

Questioning;
Discussion.

TEXT BOOK

AIR AND COMBUSTION

Smouldering of phosphorus.

By the end of the lesson, the learner should be able to:
Describe an experiment to show percentage of air used up when phosphorus smoulders.

Teacher demonstration;
Discussion.

White phosphorus, trough.

K.L.B.
BOOK I
PP. 72-73

AIR AND COMBUSTION

Presence of carbon (IV) oxide and water in the air.

By the end of the lesson, the learner should be able to:
Describe an experiment to show presence of carbon (IV) oxide and water in the air.

Teacher demonstration;
Probing questions on colour changes;
Discussion.

Aspirator, lime water, u-tube, anhydrous calcium chloride.

K.L.B.
BOOK I
PP. 73-74

AIR AND COMBUSTION

Fractional distillation of liquid air.

By the end of the lesson, the learner should be able to:
Describe fractional distillation of liquid air.

Q/A to review fractional distillation;
Discuss flow diagram.

Flowchart.

K.L.B.
BOOK I
PP 75-76

AIR AND COMBUSTION

Lab preparation of oxygen.

By the end of the lesson, the learner should be able to:
Prepare oxygen in the lab.
State physical properties of oxygen.

Teacher demonstration / group expts;
Questioning;
Discussion.

Sodium peroxide, manganese (IV) oxide, potassium permanganate.

K.L.B.
BOOK I
PP. 78-79

AIR AND COMBUSTION

Lab preparation of oxygen.
Burning metals in air (oxygen)

By the end of the lesson, the learner should be able to:
Prepare oxygen in the lab.
State physical properties of oxygen.
State how metals burn in air.

Teacher demonstration / group expts;
Questioning;
Discussion.

Teacher demonstration;
Questioning;
Discussion.
Write equations.

Sodium peroxide, manganese (IV) oxide, potassium permanganate.
Sodium, calcium,
magnesium,
iron, copper.

K.L.B.
BOOK I
PP. 78-79
K.L.B.
BOOK I
PP. 80-81

AIR AND COMBUSTION

Products of burning metals in air.

By the end of the lesson, the learner should be able to:
Identify products of burning metals in air.

Group experiments;
Testing for products;
Write chemical equations.

Weighing balance.

K.L.B.
BOOK I
PP. 82-83,
P. 85

AIR AND COMBUSTION

Reactivity series.

By the end of the lesson, the learner should be able to:
Recall the reactivity series for some metals.

Questioning;
Discussion.

Chart- reactivity series for metals.

K.L.B.
BOOK I
P. 83

AIR AND COMBUSTION

Reactivity series.
Burning non-metals in air (oxygen)

By the end of the lesson, the learner should be able to:
Recall the reactivity series for some metals.
Identify products of burning non-metals in air.

Questioning;
Discussion.

Teacher demonstration;
Questioning;
Discussion.
Write equations.

Chart- reactivity series for metals.
Carbon, sulphur, phosphorus.

K.L.B.
BOOK I
P. 83
K.L.B.
BOOK I
PP. 84-85

AIR AND COMBUSTION

Competition for oxygen.

By the end of the lesson, the learner should be able to:
Describe redox reactions.
Write equations for redox reactions.
State applications of redox reactions.

Q/A to review redox reactions;
Teacher demonstrations;
Discussion.
Write equations.

Metals and metal oxides.

K.L.B.
BOOK I
PP. 86-87

AIR AND COMBUSTION

Reactivity series based on redox reactions, Uses of oxygen. Environmental pollution.

By the end of the lesson, the learner should be able to:
Recall the reactivity series.
State uses of oxygen.
Discuss environmental pollution.

Q/A to review redox reactions;

Open discussion.

TEXT BOOK

K.L.B.
BOOK I
PP. 88-89

AIR AND COMBUSTION
WATER AND HYDROGEN

Reactivity series based on redox reactions, Uses of oxygen. Environmental pollution.
Burning candle wax in air.

By the end of the lesson, the learner should be able to:
Recall the reactivity series.
State uses of oxygen.
Discuss environmental pollution.




Test for the products of burning candle wax in air.

Q/A to review redox reactions;

Open discussion.



Teacher demonstrations;
Discussion.

TEXT BOOK



Candles, lime water.

K.L.B.
BOOK I
PP. 88-89



K.L.B.
BOOK I
PP. 91-92

WATER AND HYDROGEN

Reaction of cold water with metals.

By the end of the lesson, the learner should be able to:
Identify products of reaction of cold water with metals.

Teacher demonstrations;
Discussion;
Write equations.

Calcium, sodium grain.

K.L.B.
BOOK I
PP. 92-94

WATER AND HYDROGEN

Reaction of steam with metals.

By the end of the lesson, the learner should be able to:
Identify products of reaction of steam with metals.
Recall the reactivity series of metals based on reaction with water.

Teacher demonstrations;
Test for evolved gas;
Discussion;
Write equations.
Review reactivity series.

Magnesium ribbon, sand, iron / steel wool.

K.L.B.
BOOK I
PP. 94-96

WATER AND HYDROGEN

Reaction of steam with metals.
Hydrogen. - lab preparation.

By the end of the lesson, the learner should be able to:
Identify products of reaction of steam with metals.
Recall the reactivity series of metals based on reaction with water.


Describe laboratory preparation of hydrogen.

Teacher demonstrations;
Test for evolved gas;
Discussion;
Write equations.
Review reactivity series.


Teacher demonstrations;
Discussion.

Magnesium ribbon, sand, iron / steel wool.
Zinc granules,
dil HCl,
conc. sulphuric acid.

K.L.B.
BOOK I
PP. 94-96
K.L.B.
BOOK I
P. 97

WATER AND HYDROGEN

Hydrogen. - physical properties.

By the end of the lesson, the learner should be able to:
State physical properties of hydrogen.

Probing questions and discussion.

Zinc granules,
dil HCl,
conc. sulphuric acid, litmus papers.

K.L.B.
BOOK I
PP. 97-98

WATER AND HYDROGEN

Hydrogen as a reducing agent.

By the end of the lesson, the learner should be able to:
Describe an experiment to show reducing properties of hydrogen.

Teacher demonstration;
Discussion;
Write equations.

Copper (II) oxide, anhydrous Copper (II) sulphate., dry hydrogen.

K.L.B.
BOOK I
PP. 99-101

WATER AND HYDROGEN

Hydrogen as a reducing agent.
Burning hydrogen in air.

By the end of the lesson, the learner should be able to:
Describe an experiment to show reducing properties of hydrogen.
Identify products of burning hydrogen in air.

Teacher demonstration;
Discussion;
Write equations.

Teacher demonstration;
Discussion.

Copper (II) oxide, anhydrous Copper (II) sulphate., dry hydrogen.
Anhydrous calcium chloride,
hydrogen, U tube, ice cold water.

K.L.B.
BOOK I
PP. 99-101
K.L.B.
BOOK I
PP. 101-102

WATER AND HYDROGEN

Uses of hydrogen.

By the end of the lesson, the learner should be able to:
State uses of hydrogen.

Probing questions;
Open discussion.

TEXT BOOK

K.L.B.
BOOK I
PP. 102-103