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Chemistry
Form 3 2025
TERM II
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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1 1
THE MOLE
Molarity of a solution.
Preparation of molar solutions.
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
Volumetric flasks, teat droppers/wash bottle.
Sodium hydrogen pellets.
Weighing balance.
K.L.B. BK III
PP. 48-49

Longhorn
Book III
PP 76-81
1 2-3
THE MOLE
Calculators on molar solutions.
Dilution of solutions.
Stoichiometry of a chemical reaction.
Stoichiometric equations.
By the end of the lesson, the learner should be able to:
Solve numerical calculations on molar solutions.
Problems on molar solutions.

To determine mole ratio of given reactions.
Worked examples.
Supervised exercise.
Assignment.
Group experiments: - Determine masses, hence moles of reacting CuSO4 solution and iron metal.
student book
CuSO4 solution and iron metal.
student book
K.L.B. BK III
P 51
Longhorn Book III PP 76-81

K.L.B. BK III
P. 56
Longhorn Book III PP 87-92
1 4
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
1 5
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
2 1
Volumetric Analysis.
Titration process.
By the end of the lesson, the learner should be able to:
To define titration as a process.
Define a titration end-point.
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.
Indicators
Suitable acid and base.
K.L.B.
BK III
PP. 64-67

Longhorn
Book III
PP 108-114
2 2-3
Volumetric Analysis.
Titration experiment (Neutralization reaction)
Titration experiment (Neutralization reaction)
Basicity of an acid.
Standardization of HCl.
By the end of the lesson, the learner should be able to:
To carry out a titration experiment and obtain accurate results.
To define basicity of an acid.
Class experiments: - To neutralize HCl with NaOH solution.
Fill in a table of results.
Find the average base used.

Complete a table of number of replaceable hydrogen ions of an acid; hence define basicity of an acid.
Write corresponding ionic equations.
student book
Calculators.
student book
Dilute HCl, Na2CO3 solutions.
K.L.B. BK III
P. 66

Longhorn Book III PP 108-114

K.L.B. BK III
P. 73
2 4
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
2 5
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
3 1
Volumetric Analysis.
Water of crystallization.
Formula mass of ammonium iron (II) sulphate.
By the end of the lesson, the learner should be able to:
To determine amount of water of crystallization in ammonium iron sulphate crystals.
Teacher exposes the formula of water of crystallization.
Class experiment.
Filling in a table of results.
Ammonium
Iron (II)
Sulphate crystals.
Dilute sulphuric (VI) acid.
student book
K.L.B. BK III
P. 76
3 2-3
Volumetric Analysis.
Formula mass of a given salt.
Atomicity of gases.
Mass and volume of gases.
Molar gas volume.
By the end of the lesson, the learner should be able to:
To solve numerical problems involving water of crystallization.

To determine mass and volume of gases.
Problem solving from sample results.
Teacher demonstration: - Determining mass of known volumes of oxygen / CO2.
student book
Lubricated syringes
Oxygen/
CO2.
student book
K.L.B. BK III
P.77
K.L.B. BK III
P. 81
Longhorn BK III
PP 126-127
3 4
Volumetric Analysis.
Combining volumes of gases.
By the end of the lesson, the learner should be able to:
To compare combining volumes of two reacting gases.
Teacher demonstration: - Determining volumes of reacting gases; hence deduce volume rations.
student book
K.L.B BK III
P. 82
3 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
4 1
NITROGEN & ITS COMPOUNDS.
Isolation of nitrogen from air.
Industrial production of nitrogen.
By the end of the lesson, the learner should be able to:



Describe isolation of nitrogen from air.



Teacher demonstration, explanations and equations.
Aspirator, copper turnings, gas jar, combustion tube, trogh.
charts
K.L.B. BK III
PP. 134-135

Longhorn Book
P 186
4 2-3
NITROGEN & ITS COMPOUNDS.
Lab. preparation of nitrogen.
Physical and chemical properties of nitrogen. Uses of nitrogen.
Nitrogen (I) oxide. Lab preparation.
By the end of the lesson, the learner should be able to:
Describe lab preparation of nitrogen.
To describe Nitrogen (I) oxide.
Teacher demonstration:
Students? record observations made from tests on the gas.
Writing equations of reactions.
Teacher demonstration: -
Carry out tests on the gas.
Students record observations in a table.
Guided discussion.
Ammonium chloride, sodium nitrate
charts
Ammonium nitrate.
K.L.B. BK III
P. 137

Longhorn
Book III
P 190-1

K.L.B. BK III
PP. 139-141

Longhorn
Book III
PP 195-6
4 4
NITROGEN & ITS COMPOUNDS.
Properties and uses of Nitrogen (I) oxide.
Nitrogen (II) oxide. Lab preparation.
By the end of the lesson, the learner should be able to:
To list down physical properties of nitrogen (I) oxide.
To describe chemical properties of nitrogen (I) oxide.
To list down uses of nitrogen (I) oxide.
Q/A: Deductions from tests carried out.
Discussion of chemical properties and writing of equations.

Teacher elucidates uses of nitrogen (1) oxide.
charts
Dil nitric acid, copper turnings.

K.L.B. BK III
P. 141
Longhorn
Book III
PP 191-2
4 5
NITROGEN & ITS COMPOUNDS.
Properties of the gas.
By the end of the lesson, the learner should be able to:
To list down physical properties of nitrogen (II) oxide
To describe chemical properties of nitrogen (11) oxide
Q/A: Deductions from tests carried out.
Discussion of chemical properties and writing of equations.
Carry out a confirmatory test for the presence of the gas.
charts
K.L.B.
BK III
P. 143

Longhorn
Book III
PP 192-200
5

C.A.T 1

6 1
NITROGEN & ITS COMPOUNDS.
Nitrogen (1V) oxide Lab preparation.
Properties of Nitrogen (IV) oxide.
By the end of the lesson, the learner should be able to:
To describe nitrogen (IV) oxide lab preparation.
Teacher demonstration: - Preparation of the gas and corresponding equation.
Tests on the gas and make observations.
Conc. nitric acid, copper turnings.
charts
K.L.B. BK III
PP. 144-145
6 2-3
NITROGEN & ITS COMPOUNDS.
Ammonia. Lab preparation of ammonia.
Properties of ammonia.
Solubility of ammonia.
By the end of the lesson, the learner should be able to:
To describe lab preparation of ammonia
To describe an experiment to determine solubility of ammonia.
Q/A: Structure of ammonia.
Group experiments: Preparation of ammonia.
Tests on the gas.
Teacher demonstration.

Discussion.
Ca(OH)2, NH4Cl Solutions, CaO, litmus papers..M THREE CHEMISTRY TERM TWO 20....
charts
K.L.B. BK III
PP. 147-148

K.L.B. BK III
P. 150
6 4
NITROGEN & ITS COMPOUNDS.
Reaction of ammonia with metal ions.
Ionic equations of above reactions.
By the end of the lesson, the learner should be able to:
To prepare aqueous solution of ammonia.


To carry out tests of aqueous ammonia on metal ions.
Teacher demonstration: - Preparation of aqueous solution of ammonia.

Class experiments: -
Students record observations when drops of aqueous ammonia are added, then in excess.
2 cm Solutions containing various metal ions.
charts

K.L.B.
BK III
PP. 152-153
6 5
NITROGEN & ITS COMPOUNDS.
Burning ammonia in the air.
By the end of the lesson, the learner should be able to:
To describe burning ammonia in the air.
Teacher demonstration
Discussion
Chemical equations of reactions.
Conc. Ammonium solution
Hot platinum rod
Oxygen.
K.L.B.
BK III
P. 158
Longhorn
Book III
PP 219
7 1
NITROGEN & ITS COMPOUNDS.
Reaction of ammonia with copper (II) Oxide.
Haber process.
By the end of the lesson, the learner should be able to:
To name products formed when ammonia reacts with hot CuCl2 solid.
To explain reducing properties of ammonia.
Teacher demonstration and discussion.
Write down equations for the reactions.
Granular CuCl2
Combustion tube,
Dry ammonia
U-tube
Gas jar.
Chart- schematic diagram.

K.L.B.
BK III
P. 158
7 2-3
NITROGEN & ITS COMPOUNDS.
Uses of ammonia.
Nitric acid. Lab preparation.
Nitric acid Industrial manufacture.
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 industrial manufacture of nitric acid.
Teacher elucidates uses of ammonia and nitrogenous fertilizers.
Discussion and writing equations.
charts
Retort stand
Conc. H2SO4
KNO3
Chart
Schematic diagram.
K.L.B. BK III
P. 161

Longhorn
Book III
PP 126 -226

K.L.B. BK III
P. 164
7 4
NITROGEN & ITS COMPOUNDS.
Reaction of dilute Nitric acid with metals.
Nitric acid and carbonates.
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
Solutions of
Na2CO3
NaHCO3
ZnCO3
CuCO3
K.L.B. BK III
PP. 165-166

Longhorn
Book III
PP 166-8
7 5
NITROGEN & ITS COMPOUNDS.
Reaction of dil. nitric acid with hydrogen carbonates.
By the end of the lesson, the learner should be able to:
Write equations for reaction of dil. nitric acid with hydrogen carbonates.
Discussion and corresponding equations.
K.L.B. BK III
P. 167
8 1
NITROGEN & ITS COMPOUNDS.
Dilute nitric acid and metal hydroxides and oxides.
By the end of the lesson, the learner should be able to:
Predict results of reacting dilute nitric acid with metal hydroxides and oxides.
Group experiments & writing equations for the reactions.
Metal hydroxides.
K.L.B. BK III
P. 168

Longhorn
Book III
PP 238-240
8 2-3
NITROGEN & ITS COMPOUNDS.
Reaction of nitric acid as an oxidizing agent.
Uses of nitric acid & nitrates.
Action of heat on nitrates.
By the end of the lesson, the learner should be able to:
Describe reactions of nitric acid as an oxidizing agent.
To write equations of decomposition of nitrates on heating.
Class experiments: -
Explain observations made.
Discuss above observations.
Write relevant equations.
Nitric acid acidified iron sulphate, sulphur, and copper metal.
charts
K.L.B. BK III
PP. 169-170

Longhorn Book III
PP 239 -240

K.L.B. BK III
P 172
8 4
NITROGEN & ITS COMPOUNDS.
Test for nitrates.
Nitrogen compounds and the environment.
By the end of the lesson, the learner should be able to:
To carry out tests on nitrates.
Class experiments.
Make observations and deductions.
Discuss the brown ring test for nitrates.
charts
K.L.B. BK III
PP 173-174

Longhorn
Book III
PP 243
8 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
9

Half term

10 1
SULPHUR AND ITS COMPOUNDS
Allotropes of sulphur.
Physical properties of sulphur. Heating 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
charts
K.L.B. BK III
PP. 182-183
Longhorn Book
PP 126-129
10 2-3
SULPHUR AND ITS COMPOUNDS
Chemical properties of sulphur.
Uses of sulphur. Sulphur dioxide.
Physical properties of sulphur dioxide.
By the end of the lesson, the learner should be able to:
To investigate and describe chemical properties of sulphur.
State uses of sulphur.
Describe lab. preparation of sulphur dioxide.
Group experiments.
Discuss observations.
Write corresponding equations.
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
charts
text book
K.L.B.BK III
PP.188-190
Longhorn
Book III
PP 256-8

K.L.B.BK III
PP 191- 192
Longhorn Book
P 258
10 4
SULPHUR AND ITS COMPOUNDS
Acidic properties of SO2.
By the end of the lesson, the learner should be able to:
To carry out experiments to determine acidic properties of SO2.
Teacher demonstration to verify acidic properties of sulphur dioxide.
Write equations.
textbook
K.L.B.BK III
P. 193
Longhorn
Book III
PP 262-3
10 5
SULPHUR AND ITS COMPOUNDS
Reducing action of SO2.
By the end of the lesson, the learner should be able to:
To verify reducing action of SO2.
Class experiments: make observations and draw conclusions.
Write balanced corresponding equations.
Experimental worksheets.
K.L.B.BK III
P. 195
11 1
SULPHUR AND ITS COMPOUNDS
Bleaching properties of SO2.
Oxidizing action of SO2.
By the end of the lesson, the learner should be able to:
To carry out experiments to determine bleaching properties of SO2.
Discuss the observations made above.
Write corresponding equations.
Burning magnesium.
Hydrogen sulphide.
K.L.B .BK III
P. 194
Longhorn
Book III
PP 263-4
11 2-3
SULPHUR AND ITS COMPOUNDS
Sulphate and sulphite ions. Uses of SO2.
Sulphuric acid. Contact process of manufacture.
Properties of conc. H2SO4.
By the end of the lesson, the learner should be able to:
To carry out tests for Sulphate and sulphite ions.

State uses of SO2.
To identify raw materials for manufacture of sulphuric acid.
To describe the contact process.
Class experiments.
Make deductions from the observations made.
Write (ionic) equations for the reactions.
Teacher elucidates uses of SO2.

Discussion using schematic
flow charts.
Writing equations.
Sodium sulphate
Barium chloride
Barium nitrate.
Chart-schematic
Flow charts.
charts
K.L.B.
BK III P. 200
Longhorn
Book III
PP 268-9


K.L.B. BK III
PP.201-203
Longhorn
Book III
PP 275-6
11 4
SULPHUR AND ITS COMPOUNDS
Physical properties of sulphuric acid.
By the end of the lesson, the learner should be able to:
To dilute conc. sulphuric acid.
State physical properties of sulphuric acid.
Teacher demonstration ? diluting conc. sulphuric acid.
Discuss use of conc. sulphuric acid as a drying and dehydrating agent.
Conc. sulphuric acid.
K.L.B.
BK III P. 205
Longhorn
Book III
PP 274-5
11 5
SULPHUR AND ITS COMPOUNDS
Chemical properties of Sulphuric acid.
By the end of the lesson, the learner should be able to:
To write equations to show that conc. sulphuric acid is a drying and dehydrating agent.
To describe reactions of dilute H2SO4 with metals.
Discussion and explanations.
Group expts. ? reaction of metals with dilute H2SO4, make observations and relevant deductions; writing corresponding equations.
Magnesium, zinc, copper metals.
K.L.B.
BK III P. 206
Longhorn
Book III
PP 276-8
12 1
SULPHUR AND ITS COMPOUNDS
Dilute H2SO4, carbonates and hydrogen carbonates.
Dilute H2SO4, and metal oxides and hydroxides.
By the end of the lesson, the learner should be able to:
To describe reaction of dilute H2SO4 with carbonates and hydrogen carbonates.
Discussion, writing relevant equations.
charts
Oxides of magnesium, zinc, copper.
NaOH Solution.

K.L.B.
BK III P. 208
12 2-3
SULPHUR AND ITS COMPOUNDS
Dilute H2SO4 and metal oxides & hydroxides.
Hydrogen sulphide. Preparation of the gas. Reaction of the gas with oxygen.
By the end of the lesson, the learner should be able to:
To explain reactions of dilute H2SO4 with metal oxides and hydroxides.
To describe preparation of hydrogen sulphide.
To state properties of the gas.
Discussion, writing relevant chemical equations.
Theoretical / descriptive approach.
Writing corresponding equations.
Discuss physical properties of the gas and reaction of the gas with oxygen.
charts

K.L.B.
BK III P. 211
K.L.B.
BK III P. 210
Longhorn
Book III
PP 289-90
12 4
SULPHUR AND ITS COMPOUNDS
Reaction of the gas with water. Reducing properties of the gas.
By the end of the lesson, the learner should be able to:
To write equations for reaction of the gas with water.
To demonstrate reducing properties of the gas.
Writing chemical equations for the reactions.
charts
K.L.B.
BK III P. 212.
Longhorn
Book III
PP 291-2
12 5
SULPHUR AND ITS COMPOUNDS
Sulphur and its effects on the environment.
By the end of the lesson, the learner should be able to:
To explain environmental pollution caused by sulphur and its compounds.
Discussion and explanation.
charts
K.L.B.
BK III P. 214
Longhorn Book
PP 293-5
13

END TERM EXAM


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