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Chemistry
Form 3 2025
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1 3
SULPHUR AND ITS COMPOUNDS
Extraction of sulphur.
By the end of the lesson, the learner should be able to:

To describe extraction of sulphur by Frasch process.

Illustrate and discuss extraction of sulphur.
Chart-the Frasch process.
K.L.B. BK III
PP.180-181
Longhorn
Book III
PP 126-129
1 4
SULPHUR AND ITS COMPOUNDS
Allotropes of sulphur.
By the end of the lesson, the learner should be able to:
To identify allotropes of sulphur.
To describe preparation of allotropes of sulphur.
Discussion and exposition of new concepts.
video
K.L.B. BK III
PP. 182-183
Longhorn Book
PP 126-129
1 5
SULPHUR AND ITS COMPOUNDS
Allotropes of sulphur.
By the end of the lesson, the learner should be able to:
To identify allotropes of sulphur.
To describe preparation of allotropes of sulphur.
Discussion and exposition of new concepts.
video
K.L.B. BK III
PP. 182-183
Longhorn Book
PP 126-129
2 1
SULPHUR AND ITS COMPOUNDS
Physical properties of sulphur. Heating of sulphur.
By the end of the lesson, the learner should be able to:
To list physical properties of sulphur.

To describe effects of heat on sulphur.
Class experiment:
Solubility of sulphur in water, benzene, e.t.c,.
Class experiments:
Heating sulphur gently then strongly.
Discuss the observations.
charts
K.L.B. BK III
P.184
Longhorn I
Book III
PP 253-255
2 2-3
SULPHUR AND ITS COMPOUNDS
Chemical properties of sulphur.
By the end of the lesson, the learner should be able to:
To investigate and describe chemical properties of sulphur.
Group experiments.
Discuss observations.
Write corresponding equations.
charts
K.L.B.BK III
PP.188-190
Longhorn
Book III
PP 256-8
2 4
SULPHUR AND ITS COMPOUNDS
Chemical properties of sulphur.
By the end of the lesson, the learner should be able to:
To investigate and describe chemical properties of sulphur.
Group experiments.
Discuss observations.
Write corresponding equations.
charts
K.L.B.BK III
PP.188-190
Longhorn
Book III
PP 256-8
2 5
SULPHUR AND ITS COMPOUNDS
Uses of sulphur. Sulphur dioxide.
By the end of the lesson, the learner should be able to:
State uses of sulphur.
Describe lab. preparation of sulphur dioxide.
Teacher elucidates uses of sulphur.
Teacher demonstration:-
Preparation of sulphur dioxide in a fume chamber/in the open.
Carrying out tests on the gas.
charts
K.L.B.BK III
PP 191- 192
Longhorn Book
P 258
3 1
SULPHUR AND ITS COMPOUNDS
Physical properties of sulphur dioxide.
By the end of the lesson, the learner should be able to:
To list down physical properties of sulphur dioxide.
Discuss the above tests.
text book
K.L.B.BK III
PP 193
Longhorn
Book III
PP 262-3
3 2-3
SULPHUR AND ITS COMPOUNDS
CHLORINE & ITS COMPOUNDS
Physical properties of sulphur dioxide.
Lab. preparation of chlorine gas.
By the end of the lesson, the learner should be able to:
To list down physical properties of sulphur dioxide.


Describe laboratory preparation of chlorine gas.
Discuss the above tests.


Teacher demonstration ? gas prep. tests on the gas.
text book

Conc. HCl, Manganese (IV) oxide.
K.L.B.BK III
PP 193
Longhorn
Book III
PP 262-3


K.L.B.BK III
P. 219
Longhorn
Book III
PP 298-9
3 4
CHLORINE & ITS COMPOUNDS
Physical properties of chlorine.
By the end of the lesson, the learner should be able to:
State physical properties of chlorine.
Q/A: Relate the properties to the method of collection of the gas.
Write equations for the reaction leading to formation of chlorine.
charts
K.L.B.BK III
P. 220.
Longhorn
Book III
P 301
3 5
CHLORINE & ITS COMPOUNDS
Physical properties of chlorine.
By the end of the lesson, the learner should be able to:
State physical properties of chlorine.
Q/A: Relate the properties to the method of collection of the gas.
Write equations for the reaction leading to formation of chlorine.
charts
K.L.B.BK III
P. 220.
Longhorn
Book III
P 301
4 1
CHLORINE & ITS COMPOUNDS
Chemical properties of chlorine ? reaction with water.
By the end of the lesson, the learner should be able to:
To investigate and explain reaction of chlorine with water.
Teacher demonstration:
Writing chemical equations.
Moist blue litmus papers.
K.L.B.BK III
P. 222
Longhorn
Book III
PP 301-2
4 2-3
CHLORINE & ITS COMPOUNDS
Chemical properties of chlorine - Reaction with metals - Reaction with non-metals.
By the end of the lesson, the learner should be able to:
To investigate and explain reaction of chlorine with metals / non-metals.
Teacher demonstration:
Discussion.
Writing chemical equations.
textbook
K.L.B.BK III
PP.
224 -225
Longhorn
Book III
PP 303-5
4 4
CHLORINE & ITS COMPOUNDS
Chemical properties of chlorine - Reaction with metals - Reaction with non-metals.
By the end of the lesson, the learner should be able to:
To investigate and explain reaction of chlorine with metals / non-metals.
Teacher demonstration:
Discussion.
Writing chemical equations.
textbook
K.L.B.BK III
PP.
224 -225
Longhorn
Book III
PP 303-5
4 5
CHLORINE & ITS COMPOUNDS
- Oxidizing properties of chlorine.
By the end of the lesson, the learner should be able to:
To investigate and explain reaction of chlorine with reducing a gents.
Group experiments.
Discuss and explain observations made.
Write corresponding chemical equations.
Expt. Worksheets.
K.L.B. BK III
PP. 226 -227
Longhorn Book
PP 307-8
5 1
CHLORINE & ITS COMPOUNDS
Chlorine and alkalis.
By the end of the lesson, the learner should be able to:
To investigate and explain reaction of chlorine with alkalis.
Teacher demonstration: Bubbling chlorine with dilute cold / hot NaOH solution.
Make observations and account for them.
Cold / hot NaOH solutions.
K.L.B.BK III
P. 228
Longhorn Book III
PP 313-4
5 2-3
CHLORINE & ITS COMPOUNDS
Chlorine and alkalis.
By the end of the lesson, the learner should be able to:
To investigate and explain reaction of chlorine with alkalis.
Teacher demonstration: Bubbling chlorine with dilute cold / hot NaOH solution.
Make observations and account for them.
Cold / hot NaOH solutions.
K.L.B.BK III
P. 228
Longhorn Book III
PP 313-4
5 4
CHLORINE & ITS COMPOUNDS
Test for chlorides.
By the end of the lesson, the learner should be able to:
To carry out tests for chlorides.
Class expts.
Discuss observations, results.
Write chemical equations for the reactions.
Expt. Worksheets.
Zinc chloride, litmus paper, conc. Sulphuric acid.
K.L.B.BK III
P. 230
Longhorn Book III
PP 318-319
5 5
CHLORINE & ITS COMPOUNDS
Test for chlorides.
By the end of the lesson, the learner should be able to:
To carry out tests for chlorides.
Class expts.
Discuss observations, results.
Write chemical equations for the reactions.
Expt. Worksheets.
Zinc chloride, litmus paper, conc. Sulphuric acid.
K.L.B.BK III
P. 230
Longhorn Book III
PP 318-319
6 1
CHLORINE & ITS COMPOUNDS
Uses of chlorine gas.
By the end of the lesson, the learner should be able to:
To state uses of chlorine.
Teacher elucidates uses of chlorine.
K.L.B.BK III
P. 231
Longhorn Book III
PP 320
6 2-3
CHLORINE & ITS COMPOUNDS
Uses of chlorine gas.
Hydrogen chloride gas. Lab. prep. Physical properties.
By the end of the lesson, the learner should be able to:
To state uses of chlorine.
To describe Lab. prep of hydrogen chloride gas.
To investigate and state physical properties of hydrogen chloride gas.
Teacher elucidates uses of chlorine.

Teacher demonstration.
Carry out tests on the gas and deduce the properties of the gas.

Sodium chloride crystals, conc H2SO4
K.L.B.BK III
P. 231
Longhorn Book III
PP 320


K.L.B.BK III
P. 232
Longhorn
Book III
PP 323-4
6 4
CHLORINE & ITS COMPOUNDS
Hydrogen chloride gas. Lab. prep. Physical properties.
By the end of the lesson, the learner should be able to:
To describe Lab. prep of hydrogen chloride gas.
To investigate and state physical properties of hydrogen chloride gas.
Teacher demonstration.
Carry out tests on the gas and deduce the properties of the gas.
Sodium chloride crystals, conc H2SO4

K.L.B.BK III
P. 232
Longhorn
Book III
PP 323-4
6 5
CHLORINE & ITS COMPOUNDS
Hydrogen chloride gas. Lab. prep. Physical properties.
By the end of the lesson, the learner should be able to:
To describe Lab. prep of hydrogen chloride gas.
To investigate and state physical properties of hydrogen chloride gas.
Teacher demonstration.
Carry out tests on the gas and deduce the properties of the gas.
Sodium chloride crystals, conc H2SO4

K.L.B.BK III
P. 232
Longhorn
Book III
PP 323-4
7 1
CHLORINE & ITS COMPOUNDS
Aqueous hydrogen chloride.
By the end of the lesson, the learner should be able to:
To prepare aqueous hydrogen chloride.
Class experiment leading to deduction of chemical properties of hydrogen chloride gas.
Distilled water.

K.L.B.BK III
P. 234
7 2-3
CHLORINE & ITS COMPOUNDS
Further chemical properties of hydrogen chloride gas.
By the end of the lesson, the learner should be able to:
To determine chemical properties of hydrogen chloride gas.
To carry out confirmatory test for hydrogen chloride gas.
Class experiment leading to deduction of further chemical properties of hydrogen chloride gas / confirmatory test for hydrogen chloride gas.
Ammonia solution.
K.L.B. BK III
PP.
235 -223
Longhorn
Book III
PP 327-331
7 4
CHLORINE & ITS COMPOUNDS
Further chemical properties of hydrogen chloride gas.
By the end of the lesson, the learner should be able to:
To determine chemical properties of hydrogen chloride gas.
To carry out confirmatory test for hydrogen chloride gas.
Class experiment leading to deduction of further chemical properties of hydrogen chloride gas / confirmatory test for hydrogen chloride gas.
Ammonia solution.
K.L.B. BK III
PP.
235 -223
Longhorn
Book III
PP 327-331
7 5
CHLORINE & ITS COMPOUNDS
Large-scale production of hydrochloric acid.
By the end of the lesson, the learner should be able to:
Identify raw materials for manufacture of hydrochloric acid in large scale.
Describe the manufacturing process.
Discussion and giving relevant equations.
charts
K.L.B.BK III
P. 237
Longhorn Book III
P 330
8 1
CHLORINE & ITS COMPOUNDS
Uses of hydrochloric acid.
By the end of the lesson, the learner should be able to:
To state uses of hydrochloric acid.
Brief discussion.
charts
K.L.B. BK III
P. 237
Longhorn Book III
P 331-3
8 2-3
CHLORINE & ITS COMPOUNDS
Uses of hydrochloric acid.
Effects of hydrochloric acid on the environment.
By the end of the lesson, the learner should be able to:
To state uses of hydrochloric acid.
To explain effects of hydrochloric acid on the environment.
Brief discussion.
Discussion and explanation.
Assignment.
charts
K.L.B. BK III
P. 237
Longhorn Book III
P 331-3

K.L.B. BK III
P 238.
Longhorn Book III
PP 334-8
8-9

Mid term Break and Examination

9 5
THE MOLE
Mole, molar mass and R.A.M.
By the end of the lesson, the learner should be able to:
Define the term mole as a quantity of measurement.
Relate the mole to R.A.M and molar mass.
Discuss various analogies that lead to the definition of the mole.
Expose the meaning of R.A.M., Avogadro?s constant and molar mass.
Chart- table of molar masses of elements.
K.L.B. BK III
PP. 27-31
Longhorn
Book III
PP 34-35
10 1
THE MOLE
Number of moles in a substance.
By the end of the lesson, the learner should be able to:
Calculate number of moles in a given mass of a substance.
Worked examples.
Supervised practice.
student book
K.L.B .BK III
P. 34
Longhorn
BK III
PP 39-40
10 2-3
THE MOLE
Number of moles in a substance.
Relative molecular mass & Relative formula mass.
By the end of the lesson, the learner should be able to:
Calculate number of moles in a given mass of a substance.
Define relative molecular mass.
Calculate RMM of a compound.
Worked examples.
Supervised practice.
Q/A: - Review formulae of compounds.
Complete a table of compounds and their molecular / formula mass.
student book
Calculators.
K.L.B .BK III
P. 34
Longhorn
BK III
PP 39-40

K.L.B.BK III
PP. 34-35

Longhorn Book III PP 44-60
10 4
THE MOLE
Relative molecular mass & Relative formula mass.
By the end of the lesson, the learner should be able to:
Define relative molecular mass.
Calculate RMM of a compound.
Q/A: - Review formulae of compounds.
Complete a table of compounds and their molecular / formula mass.
Calculators.
K.L.B.BK III
PP. 34-35

Longhorn Book III PP 44-60
10 5
THE MOLE
Relative molecular mass & Relative formula mass.
By the end of the lesson, the learner should be able to:
Define relative molecular mass.
Calculate RMM of a compound.
Q/A: - Review formulae of compounds.
Complete a table of compounds and their molecular / formula mass.
Calculators.
K.L.B.BK III
PP. 34-35

Longhorn Book III PP 44-60
11 1
THE MOLE
Moles and Avogadro?s number.
By the end of the lesson, the learner should be able to:
Calculate number of particles in a given number of moles.
Review standard form of numbers.
Worked examples.
Supervised exercise.

Calculators.
K.L.B.BK III
PP. 3132
Longhorn
Book III
PP 30-31
11 2-3
THE MOLE
Empirical Formula.
By the end of the lesson, the learner should be able to:
Determine empirical formula of a compound given percentage composition by mass.
Worked examples.
Supervised practice.

Assignment.
student book
K.L.B.
BK III P. 43

Longhorn Book III PP 66-71
11 4
THE MOLE
Molecular formula.
By the end of the lesson, the learner should be able to:
Define molecular formula of a compound.
Find molecular formula given percentage composition of a compound by mass.
Worked examples.

Supervised practice.
Calculators.
K.L.B.BK III
P. 45

Longhorn
Book III
PP 73-75
11 5
THE MOLE
Molecular formula.
By the end of the lesson, the learner should be able to:
Define molecular formula of a compound.
Find molecular formula given percentage composition of a compound by mass.
Worked examples.

Supervised practice.
Calculators.
K.L.B.BK III
P. 45

Longhorn
Book III
PP 73-75
12 1
THE MOLE
Concentration of a solution.
By the end of the lesson, the learner should be able to:
Define concentration of a solution.
Find concentration of a solution in grams/litre and moles/litre.
Q/A: - Equivalent ratios, e.g. 4g dissolved in 500cm? and
8g in 1 litre.
Worked examples on concentration of solutions.
chart
K.L.B. BK III
PP. 46-48

Longhorn Book III PP 76-81
12 2-3
THE MOLE
Concentration of a solution.
Molarity of a solution.
By the end of the lesson, the learner should be able to:
Define concentration of a solution.
Find concentration of a solution in grams/litre and moles/litre.

Define molarity of a solution.
Find molarity of a solution in M/dm?
Q/A: - Equivalent ratios, e.g. 4g dissolved in 500cm? and
8g in 1 litre.
Worked examples on concentration of solutions.

Teacher explains that molarity of a solution is given in moles of the solute per litre.
Worked examples.
Supervised exercise.
chart
student book
K.L.B. BK III
PP. 46-48

Longhorn Book III PP 76-81

K.L.B. BK III
PP. 48-49

Longhorn
Book III
PP 76-81
12 4
THE MOLE
Preparation of molar solutions.
By the end of the lesson, the learner should be able to:
Define molar solutions.
Prepare molar solutions.
Q/A: - Description of preparation of molar solutions.
Volumetric flasks, teat droppers/wash bottle.
Sodium hydrogen pellets.
Weighing balance.
K.L.B. BK III
PP. 50-51

Longhorn
Book III
PP 78-81
12 5
THE MOLE
Preparation of molar solutions.
By the end of the lesson, the learner should be able to:
Define molar solutions.
Prepare molar solutions.
Q/A: - Description of preparation of molar solutions.
Volumetric flasks, teat droppers/wash bottle.
Sodium hydrogen pellets.
Weighing balance.
K.L.B. BK III
PP. 50-51

Longhorn
Book III
PP 78-81
13 1
THE MOLE
Calculators on molar solutions.
By the end of the lesson, the learner should be able to:
Solve numerical calculations on molar solutions.
Problems on molar solutions.
Worked examples.
Supervised exercise.
Assignment.
student book
K.L.B. BK III
P 51
Longhorn Book III PP 76-81
13 2-3
THE MOLE
Dilution of solutions.
Stoichiometry of a chemical reaction.
By the end of the lesson, the learner should be able to:
Calculate molarity of a solution after dilution.
To determine mole ratio of given reactions.
Group experiments.
Calculations.
Group experiments: - Determine masses, hence moles of reacting CuSO4 solution and iron metal.
student book
CuSO4 solution and iron metal.
K.L.B. BK III
PP. 76-81
K.L.B. BK III
P. 56
Longhorn Book III PP 87-92
13 4
THE MOLE
Stoichiometry of a chemical reaction.
By the end of the lesson, the learner should be able to:
To determine mole ratio of given reactions.
Group experiments: - Determine masses, hence moles of reacting CuSO4 solution and iron metal.
CuSO4 solution and iron metal.
K.L.B. BK III
P. 56
Longhorn Book III PP 87-92
13 5
THE MOLE
Stoichiometric equations.
By the end of the lesson, the learner should be able to:
To define a stoichiometric equation.
To write stoichiometric equations of the above reactions.
student book
K.L.B. BK III
Longhorn Book III PP 14-16
PP. 88-93
14 1
THE MOLE
Stoichiometric equations of various reactions.
By the end of the lesson, the learner should be able to:
To investigate and determine Stoichiometric equations of various reactions.
Class experiments.

Problem solving.
student book
K.L.B. BK III
P. 62
14 2-3
THE MOLE
Stoichiometric equations of various reactions.
By the end of the lesson, the learner should be able to:
To investigate and determine Stoichiometric equations of various reactions.
Class experiments.

Problem solving.
student book
K.L.B. BK III
P. 62

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