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SCHEME OF WORK
Chemistry
Form 3 2025
TERM II
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
2 1
NITROGEN & ITS COMPOUNDS.
Haber process.
By the end of the lesson, the learner should be able to:
Identify raw materials for Haber process and how they are obtained in large scale.
Discuss the Haber process.
Represent Haber process in a schematic diagram.
Discussion and explanations.
Chart- schematic diagram.

K.L.B. BK III
PP. 159-160
225-226
2 2-3
NITROGEN & ITS COMPOUNDS.
Uses of ammonia.
Nitric acid. Lab preparation.
By the end of the lesson, the learner should be able to:
To list down uses of ammonia.
To list down nitrogenous fertilizers.
To describe lab preparation of nitric acid.
Teacher elucidates uses of ammonia and nitrogenous fertilizers.
Teacher demonstration.
Write equations of reaction.
Discussion.
charts
Retort stand
Conc. H2SO4
KNO3
K.L.B. BK III
P. 161

Longhorn
Book III
PP 126 -226

K.L.B. BK III
P. 163
2 4
NITROGEN & ITS COMPOUNDS.
Nitric acid Industrial manufacture.
By the end of the lesson, the learner should be able to:
To describe industrial manufacture of nitric acid.
Discussion and writing equations.
Chart
Schematic diagram.
K.L.B. BK III
P. 164
2 5
NITROGEN & ITS COMPOUNDS.
Reaction of dilute Nitric acid with metals.
By the end of the lesson, the learner should be able to:
To describe reaction of dilute nitric acid with metals.
To write equations of reactions of dilute nitric acid with metals.
Class experiment:- making observations and recording them in a table.
Discuss the observations.
Write down equations for the reactions.
Magnesium
Zinc
Copper
K.L.B. BK III
PP. 165-166

Longhorn
Book III
PP 166-8
3 1
NITROGEN & ITS COMPOUNDS.
Nitric acid and carbonates.
By the end of the lesson, the learner should be able to:
To describe action of nitric acid on carbonates and hydrogen carbonates.
Group experiments: - Action of Nitric acid on hydrogen carbonates.
Solutions of
Na2CO3
NaHCO3
ZnCO3
CuCO3
K.L.B. BK III
P. 167

Longhorn
Book III
229-30
3 2-3
NITROGEN & ITS COMPOUNDS.
Reaction of dil. nitric acid with hydrogen carbonates.
Dilute nitric acid and metal hydroxides and oxides.
By the end of the lesson, the learner should be able to:
Write equations for reaction of dil. nitric acid with hydrogen carbonates.
Predict results of reacting dilute nitric acid with metal hydroxides and oxides.
Discussion and corresponding equations.
Group experiments & writing equations for the reactions.

Metal hydroxides.
K.L.B. BK III
P. 167

K.L.B. BK III
P. 168

Longhorn
Book III
PP 238-240
3 4
NITROGEN & ITS COMPOUNDS.
Reaction of nitric acid as an oxidizing agent.
By the end of the lesson, the learner should be able to:
Describe reactions of nitric acid as an oxidizing agent.
Class experiments: -
Explain observations made.
Nitric acid acidified iron sulphate, sulphur, and copper metal.
K.L.B. BK III
PP. 169-170

Longhorn Book III
PP 239 -240
3 5
NITROGEN & ITS COMPOUNDS.
Reaction of nitric acid as an oxidizing agent.
By the end of the lesson, the learner should be able to:
Describe reactions of nitric acid as an oxidizing agent.
Class experiments: -
Explain observations made.
Nitric acid acidified iron sulphate, sulphur, and copper metal.
K.L.B. BK III
PP. 169-170

Longhorn Book III
PP 239 -240
4 1
NITROGEN & ITS COMPOUNDS.
Uses of nitric acid & nitrates.
By the end of the lesson, the learner should be able to:
To state uses of nitrates.
To describe preparation of nitrates.
Discussion
Equations for the reactions for preparation of nitrates.
charts
K.L.B. BK III
P. 171

Longhorn Book III
PP 240
4 2-3
NITROGEN & ITS COMPOUNDS.
Action of heat on nitrates.
Test for nitrates.
By the end of the lesson, the learner should be able to:
To write equations of decomposition of nitrates on heating.
To carry out tests on nitrates.
Discuss above observations.
Write relevant equations.

Class experiments.
Make observations and deductions.
Discuss the brown ring test for nitrates.
charts
K.L.B. BK III
P 172
K.L.B. BK III
PP 173-174

Longhorn
Book III
PP 243
4 4
NITROGEN & ITS COMPOUNDS.
Nitrogen compounds and the environment.
By the end of the lesson, the learner should be able to:
To explain the pollution of nitrogen compounds in the environment.
To state ways of reducing environmental pollution by nitrogen compounds.
Brief guided discussion.
charts
K.L.B.BK III
PP. 173-174

Longhorn
Book III
PP 244-6
4 5
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
5 1
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
5 2-3
SULPHUR AND ITS COMPOUNDS
Physical properties of sulphur. Heating of sulphur.
Chemical properties 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.
To investigate and describe chemical properties of sulphur.
Class experiment:
Solubility of sulphur in water, benzene, e.t.c,.
Class experiments:
Heating sulphur gently then strongly.
Discuss the observations.

Group experiments.
Discuss observations.
Write corresponding equations.
charts
K.L.B. BK III
P.184
Longhorn I
Book III
PP 253-255

K.L.B.BK III
PP.188-190
Longhorn
Book III
PP 256-8
5 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
5 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
6 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
6 2-3
THE MOLE
Mole, molar mass and R.A.M.
Number of moles in a substance.
Relative molecular mass & Relative formula mass.
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.
Define relative molecular mass.
Calculate RMM of a compound.
Discuss various analogies that lead to the definition of the mole.
Expose the meaning of R.A.M., Avogadro?s constant and molar mass.
Q/A: - Review formulae of compounds.
Complete a table of compounds and their molecular / formula mass.
Chart- table of molar masses of elements.
student book
Calculators.
K.L.B. BK III
PP. 27-31
Longhorn
Book III
PP 34-35

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

Longhorn Book III PP 44-60
6 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
6 5
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
7 1
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
7 2-3
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
7 4
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
7 5
THE MOLE
Molarity of a solution.
By the end of the lesson, the learner should be able to:
Define molarity of a solution.
Find molarity of a solution in M/dm?
Teacher explains that molarity of a solution is given in moles of the solute per litre.
Worked examples.
Supervised exercise.
student book
K.L.B. BK III
PP. 48-49

Longhorn
Book III
PP 76-81
8 1
THE MOLE
Preparation of molar solutions.
Calculators on 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.
student book
K.L.B. BK III
PP. 50-51

Longhorn
Book III
PP 78-81
8 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
8 4
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
8 5
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
9 1
Volumetric Analysis.
Apparatus used in titration experiments.
By the end of the lesson, the learner should be able to:
To use and read a pipette and a burette.
Discussion and practical use of the apparatus.
Emphasis is laid on need to sterilize the apparatus after use.
Pipettes
Burettes.
K.L.B. BK III
PP. 63-64
Longhorn
Book III
PP 104-8
9 2-3
Volumetric Analysis.
Apparatus used in titration experiments.
Titration process.
By the end of the lesson, the learner should be able to:
To use and read a pipette and a burette.
To define titration as a process.
Define a titration end-point.
Discussion and practical use of the apparatus.
Emphasis is laid on need to sterilize the apparatus after use.

Review by Q/A: -
-Indicators and colour changes.
-Choice of indicators.
-Balanced chemical equations.
Discuss characteristics of a good titre, when an an-end point is attained.
Pipettes
Burettes.
Indicators
Suitable acid and base.
K.L.B. BK III
PP. 63-64
Longhorn
Book III
PP 104-8

K.L.B.
BK III
PP. 64-67

Longhorn
Book III
PP 108-114
9

HALF TERM

10 1
Volumetric Analysis.
Titration experiment (Neutralization reaction)
By the end of the lesson, the learner should be able to:
To carry out a titration experiment and obtain accurate results.
Class experiments: - To neutralize HCl with NaOH solution.
Fill in a table of results.
Find the average base used.
student book
K.L.B. BK III
P. 66

Longhorn Book III PP 108-114
10 2-3
Volumetric Analysis.
Titration experiment (Neutralization reaction)
Basicity of an acid.
By the end of the lesson, the learner should be able to:
To carry out calculations from experimental results.
To define basicity of an acid.
Step-by-step calculations.
Complete a table of number of replaceable hydrogen ions of an acid; hence define basicity of an acid.
Write corresponding ionic equations.
Calculators.
student book
K.L.B. BK III
P 66
Longhorn Book III PP 108-114

K.L.B. BK III
P. 73
10 4
Volumetric Analysis.
Standardization of HCl.
By the end of the lesson, the learner should be able to:
To define standardization of HCl.
Class experiments.
Dilute HCl, Na2CO3 solutions.

K.L.B. BK III
PP. 74-75
10 5
Volumetric Analysis.
Concentration of HCl.
By the end of the lesson, the learner should be able to:
To calculate concentration of HCl from experimental results.
Calculations & supervised practice.
K.L.B. BK III
PP. 74-75
11 1
Volumetric Analysis.
Redox Titration Reactions.
By the end of the lesson, the learner should be able to:
To standardize a solution with an iron (II) salt.
Experiment and calculations.
Potassium Magnate
(VII)
K.L.B. BK III
PP. 74-75

Longhorn
Book III
PP 114-115
11 2-3
Volumetric Analysis.
Redox Titration Reactions.
Water of crystallization.
By the end of the lesson, the learner should be able to:
To standardize a solution with an iron (II) salt.
To determine amount of water of crystallization in ammonium iron sulphate crystals.
Experiment and calculations.
Teacher exposes the formula of water of crystallization.
Class experiment.
Filling in a table of results.
Potassium Magnate
(VII)
Ammonium
Iron (II)
Sulphate crystals.
Dilute sulphuric (VI) acid.
K.L.B. BK III
PP. 74-75

Longhorn
Book III
PP 114-115

K.L.B. BK III
P. 76
11 4
Volumetric Analysis.
Formula mass of ammonium iron (II) sulphate.
By the end of the lesson, the learner should be able to:
To find formula mass of ammonium iron (II) sulphate.
Calculations from experimental results.
student book
K.L.B. BK III
PP. 76 -77
11 5
Volumetric Analysis.
Formula mass of a given salt.
By the end of the lesson, the learner should be able to:
To solve numerical problems involving water of crystallization.
Problem solving from sample results.
student book
K.L.B. BK III
P.77
12 1
Volumetric Analysis.
Atomicity of gases.
Mass and volume of gases.
By the end of the lesson, the learner should be able to:
To define atomicity of gases.
Review by Q/A atoms and molecules; hence the definition.
Discuss a table of gases and their atomicity.
student book
Lubricated syringes
Oxygen/
CO2.
K.L.B. BK III
PP. 78 -80
Longhorn BK III PP 126-128
12 2-3
Volumetric Analysis.
Molar gas volume.
Combining volumes of gases.
By the end of the lesson, the learner should be able to:
To define molar gas volume.
To compare combining volumes of two reacting gases.
Use the above results to describe volume of one mole of a gas.
Discuss molar gas volume at R.T.P and S.T.P conditions.

Teacher demonstration: - Determining volumes of reacting gases; hence deduce volume rations.
student book
K.L.B. BK III
79 ? 80
Longhorn
Book III
PP 126-127

K.L.B BK III
P. 82
12 4
Volumetric Analysis.
Gay Lussac?s Law.
By the end of the lesson, the learner should be able to:
To state Gay Lussac?s Law.
To compare Gay Lussac?s Law with Avogadro?s Law.
To solve numericals using Gay Lussac?s Law.
Teacher exposes the law; and compares it with Gay Lussac?s Law.
Worked examples.
Supervised practice.
student book
K.L.B. BK III
P. 85

Longhorn
Book III
PP 129-131
12 4-5
Volumetric Analysis.
Gay Lussac?s Law.
By the end of the lesson, the learner should be able to:
To state Gay Lussac?s Law.
To compare Gay Lussac?s Law with Avogadro?s Law.
To solve numericals using Gay Lussac?s Law.
Teacher exposes the law; and compares it with Gay Lussac?s Law.
Worked examples.
Supervised practice.
student book
K.L.B. BK III
P. 85

Longhorn
Book III
PP 129-131
13-14

END TERM EXAM AND CLOSING


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