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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
2 1-2
THE MOLE
Mole, molar mass and R.A.M.
Number of moles in a substance.
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.
Calculate number of moles in a given mass of a substance.
Discuss various analogies that lead to the definition of the mole.
Expose the meaning of R.A.M., Avogadro?s constant and molar mass.
Worked examples.
Supervised practice.
Chart- table of molar masses of elements.
student book
K.L.B. BK III
PP. 27-31
Longhorn
Book III
PP 34-35

K.L.B .BK III
P. 34
Longhorn
BK III
PP 39-40
2 3
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
2 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
2 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
3 1-2
THE MOLE
Moles and Avogadro?s number.
Empirical Formula.
By the end of the lesson, the learner should be able to:
Calculate number of particles in a given number of moles.
Determine empirical formula of a compound given percentage composition by mass.
Review standard form of numbers.
Worked examples.
Supervised exercise.


Worked examples.
Supervised practice.

Assignment.
Calculators.
student book
K.L.B.BK III
PP. 3132
Longhorn
Book III
PP 30-31

K.L.B.
BK III P. 43

Longhorn Book III PP 66-71
3 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
3 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
3 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
4 1-2
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
4 3
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
4 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
4 5
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
5 1-2
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
5 3
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
5 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
5 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
6 1-2
ORGANIC CHEMISTRY (I)
Hydrocarbons.
By the end of the lesson, the learner should be able to:
To define organic Chemistry.
To define a hydrocarbon.
To identify groups of hydrocarbons.
To describe the carbon atom.
Discuss composition of the carbon atom; hence deduce number of valence electrons.
Exposition of new terms.
student book
K.L.B. BK III
P. 92
Longhorn
Book III
P 135
6 3
ORGANIC CHEMISTRY (I)
Hydrocarbons.
By the end of the lesson, the learner should be able to:
To define organic Chemistry.
To define a hydrocarbon.
To identify groups of hydrocarbons.
To describe the carbon atom.
Discuss composition of the carbon atom; hence deduce number of valence electrons.
Exposition of new terms.
student book
K.L.B. BK III
P. 92
Longhorn
Book III
P 135
6 4
ORGANIC CHEMISTRY (I)
Alkanes.
By the end of the lesson, the learner should be able to:
To identify various alkanes.
To list sources of alkanes.
To state uses of different fractions of crude oil.
To define cracking of alkanes.
Expose various alkanes.
Discuss the biomass digester, fractional distillation of crude oil and uses of the fractions.
Discuss the cracking process.
Chart of biomass digester.
K.L.B. BK III
PP. 93-94

Longhorn
Book III
PP 135-6
6 5
ORGANIC CHEMISTRY (I)
Naming Alkanes.
By the end of the lesson, the learner should be able to:
To identify various alkanes.
To define a homologous series.
Discussion and exposition of new concepts.
student book
K.L.B. BK III
PP. 94-98
Longhorn
Book III
PP 136-139
7 1-2
ORGANIC CHEMISTRY (I)
Members of Alkane series.
Isomerism in alkanes.
By the end of the lesson, the learner should be able to:
To name members of alkane series and identify their characteristics.
To draw the structures of alkane series.

To draw and name isomers of simple hydrocarbons.
Discussion and exposition of new concepts.
Chart- structure of alkanes.
Models.
K.L.B. BK III
PP. 97-99

Longhorn Book III
PP 137-9

K.L.B. BK III
PP. 101-102 Longhorn Book III
PP 141-2
7 3
ORGANIC CHEMISTRY (I)
Isomerism in alkanes.
By the end of the lesson, the learner should be able to:
To draw and name isomers of simple hydrocarbons.
Discussion and exposition of new concepts.
Models.
K.L.B. BK III
PP. 101-102 Longhorn Book III
PP 141-2
7 4
ORGANIC CHEMISTRY (I)
Laboratory preparation of a given alkane.
By the end of the lesson, the learner should be able to:
To describe laboratory preparation of a given alkane.
To state physical properties of the gases prepared.
Teacher demonstration.
Discussion.
Sodium ethanoate, sodalime,
Pestle and mortar.
K.L.B. BK III
P. 103

Longhorn
Book III
PP 146
7 5
ORGANIC CHEMISTRY (I)
Trend in physical properties of alkanes.
By the end of the lesson, the learner should be able to:
To describe the trend in physical properties of alkanes.
Study a table of comparative properties of alkanes.
Make deductions from the table.
student book
K.L.B. BK III
P. 105

Longhorn
Book III
PP 148-9
8 1-2
ORGANIC CHEMISTRY (I)
Chemical properties of alkanes.
Substitution reactions involving alkanes. Uses of alkanes.
By the end of the lesson, the learner should be able to:
Describe chemical properties of alkanes.
To describe substitution reactions involving alkanes.

To list down uses of alkanes.
Discussion
Examples of balanced equations.
Discussion


Teacher elucidates uses of alkanes.
student book
K.L.B. BK III
P. 107
Longhorn
Book III
PP 148-9

K.L.B. BK III
P. 108

Longhorn
Book III
PP 149-50
8 3
ORGANIC CHEMISTRY (I)
Substitution reactions involving alkanes. Uses of alkanes.
By the end of the lesson, the learner should be able to:
To describe substitution reactions involving alkanes.

To list down uses of alkanes.
Discussion


Teacher elucidates uses of alkanes.
student book
K.L.B. BK III
P. 108

Longhorn
Book III
PP 149-50
8 4
ORGANIC CHEMISTRY (I)
Alkenes. Molecular formulae of alkenes.
By the end of the lesson, the learner should be able to:
To write molecular formulae of alkenes.
Examine table of members of alkenes.
To identify members of alkene series.
student book
K.L.B. BK III
PP 153-4
8 5
ORGANIC CHEMISTRY (I)
Naming alkenes.
By the end of the lesson, the learner should be able to:
To name various alkenes.
Q/Q: Nomenclature in alkenes.
Compare alkenes; hence deduce names of various alkenes.
student book
K.L.B. BK III
PP. 110-113
Longhorn
Book III
PP 154-6
9

Mid term

10 1-2
ORGANIC CHEMISTRY (I)
Alkene isomerism.
Preparing ethene in the lab.
By the end of the lesson, the learner should be able to:
Differentiate between branching and positional isomerism.
To describe lab preparation of ethene.
Discussion and drawing of molecular structures.
Teacher demonstration: - Carry out tests on ethene as students note down the observations in a table.
student book
chart
K.L.B. BK III
P. 113
Longhorn
Book III
PP 158-60

K.L.B. BK III
P 162
10 3
ORGANIC CHEMISTRY (I)
Preparing ethene in the lab.
By the end of the lesson, the learner should be able to:
To describe lab preparation of ethene.
Teacher demonstration: - Carry out tests on ethene as students note down the observations in a table.
chart

K.L.B. BK III
P 162
10 4
ORGANIC CHEMISTRY (I)
Physical properties of ethene.
By the end of the lesson, the learner should be able to:
To describe physical properties of ethene and other alkenes.
To discuss physical properties of ethene and other alkenes.

student book
K.L.B. BK III
PP. 116-117
Longhorn Book III
PP 126-129
165-6
10 5
ORGANIC CHEMISTRY (I)
Chemical properties of ethene.
By the end of the lesson, the learner should be able to:
To explain halogenation and hydrogenation reactions.
Discussion and drawing structures.
charts

KLB BK III
PP. 118-119
Longhorn
Book III
PP 166-8
11 1-2
ORGANIC CHEMISTRY (I)
Alkenes and oxidizing agents.
Uses of alkenes & Topic review.
By the end of the lesson, the learner should be able to:
To describe reactions of alkenes with oxidizing agents.
To list down uses of alkenes.
Review the double bonds in alkenes.
Review reduction process, oxidizing agent.
Discuss reactions of alkenes with conc. H2SO4, acidified potassium chromate.
Expose hydrolysis process.


Teacher elucidates uses of alkenes.

Assignment.
charts

K.L.B. BK III
PP. 120-121


Longhorn
Book III
PP 166-8

K.L.B. BK III
P. 121 Longhorn Book
PP 170-1
11 3
ORGANIC CHEMISTRY (I)
Uses of alkenes & Topic review.
By the end of the lesson, the learner should be able to:
To list down uses of alkenes.
Teacher elucidates uses of alkenes.

Assignment.
charts
K.L.B. BK III
P. 121 Longhorn Book
PP 170-1
11 4
ORGANIC CHEMISTRY (I)
Alkynes. Nomenclature.
By the end of the lesson, the learner should be able to:
To identify various alkynes.
To name and draw structures of alkynes.
Discuss a table of members of alkynes.
Review naming of alkanes and alkene and compare this with naming of alkynes.
charts
K.L.B. BK III
P. 122-123
Longhorn
Book III
PP 126-129 171-5
11 5
ORGANIC CHEMISTRY (I)
Alkynes. Nomenclature.
By the end of the lesson, the learner should be able to:
To identify various alkynes.
To name and draw structures of alkynes.
Discuss a table of members of alkynes.
Review naming of alkanes and alkene and compare this with naming of alkynes.
charts
K.L.B. BK III
P. 122-123
Longhorn
Book III
PP 126-129 171-5
12 1-2
ORGANIC CHEMISTRY (I)
Isomerism in alkynes.
Physical properties of ethyne.
By the end of the lesson, the learner should be able to:
To draw structure showing positional and branching isomerism.
To list down physical properties of ethyne.
Discussion and drawing structures.
Teacher demonstration: Preparation of ethyne.
Deduce properties of other alkynes.
charts
K.L.B. BK III
PP. 124-125
Longhorn
Book III
PP 176-8

K.L.B. BK III
PP. 125-126
Longhorn
Book III
PP 197-80
12 3
ORGANIC CHEMISTRY (I)
Physical properties of ethyne.
By the end of the lesson, the learner should be able to:
To list down physical properties of ethyne.
Teacher demonstration: Preparation of ethyne.
Deduce properties of other alkynes.
charts
K.L.B. BK III
PP. 125-126
Longhorn
Book III
PP 197-80
12 4
ORGANIC CHEMISTRY (I)
Chemical properties of ethyne.
By the end of the lesson, the learner should be able to:
To describe combustion, halogenation and hydrogenation processes.
Discussion and writing of equations.
charts
K.L.B. BK III
PP. 127-129
Longhorn Book III
PP 180-184
12 5
ORGANIC CHEMISTRY (I)
Tests for alkynes. Uses of alkynes.
By the end of the lesson, the learner should be able to:
To describe tests for alkynes and state uses of alkynes.
Discussion and explanations.

Assignment.
charts
K.L.B. BK III
P.130

Longhorn Book III
PP 180-84

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