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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 2-3
GAS LAWS
Boyle?s law.
Boyle?s law: - Equation and graphical representation.
Boyle?s law: Numerical questions.
By the end of the lesson, the learner should be able to:


State Boyle?s law.
Explain Boyle?s law using kinetic theory of matter.
Solve further problems involving Boyle?s law.
Teacher demonstration ? Use syringes / pumps to show variation of volume with pressure.
Teacher asks probing questions leading to statement of the law.
Discuss the cause of build-up-in pressure.

Supervised exercise: Volume in cm?, m?, litres, and pressure in Pa, mmHg, cmHg, atmospheres.
Assignment.
Chart
Volume-pressure relationship.
Syringes.
chart
Calculators.
K.L.B. BK III
PP. 1-2

Longhorn Book III
PP 1 -2
K.L.B. BK III
PP. 4-5
Longhorn Book III PP 6-8
1 4
GAS LAWS
Boyle?s law: Interpretation of graphs.
By the end of the lesson, the learner should be able to:
Plot and intepret graphs involving pressure and volume of gases.
Completing tables and plotting graphs.
Interpret the plotted graphs.
Make deductions from the graphs.
Graph papers.
K.L.B.
BK III
PP. 4-5
1 5
GAS LAWS
Charles? law.
By the end of the lesson, the learner should be able to:

State Charles? law.
Explain Charles? law using kinetic theory of matter.
Teacher demonstration:- To show expansion of air when heated and contraction when pressure is constant.
Explain increase in volume when temperature is raised.
Q/A: - relation between volume and temperature, leading to Charles? law.
Coloured water,
Glass tube,
Warm water,
Cork and
Flask.
.K.L.B.
BK III P. 6

Longhorn Book III PP 9-11
2 1
GAS LAWS
Temperature in Degree Celsius and Kelvin. Equation and graphs from Charles? law.
By the end of the lesson, the learner should be able to:
Convert temperature in degree Celsius to Kelvin and vice-versa.
Teacher explains inter-conversion of the units.
Students complete a table of temperature in the two units.
student book
K.L.B.
BK III P. 10

Longhorn Book III P 11
2 2-3
GAS LAWS
Charles? law- equation and graphical representation.
Numerical questions on Charles? Law.
By the end of the lesson, the learner should be able to:
Express Charles? law with equations.

Give a graphical representation of Charles? law.
Solve numerical problems based on Charles? Law.
Derive equations from volume and temperature relationship.

Exposition: - Teacher exposes a volume-temperature graph and extrapolates it to obtain the absolute temperature. The definition of absolute temperature is exposed.
Worked examples.
Supervised exercise.

Assignment.
student book
Calculators.

K.L.B. BK III
PP. 6-7

Longhorn Book III P 10

K.L.B.
BK III P. 12

Longhorn Book III PP 12-14
2 4
GAS LAWS
Combined Gas Law.
Standard conditions, S.T.P. conditions and R.T.P. conditions.
By the end of the lesson, the learner should be able to:
Derive the Gas Law.
Derive the combined gas law equation.
Solve numerical problems using the equation.
Q/A: - Combining Boyle?s and Charles? Laws.
Worked examples.
Calculators.
student book
K.L.B.
BK III P. 12

Longhorn Book III PP 14-16
2 5
GAS LAWS
Diffusion.
By the end of the lesson, the learner should be able to:

Define diffusion.
Describe experiments to show diffusion.


Group experiments.
Diffusion of KMnO4 crystals, concentrated ammonia solution.


KMnO4 crystals,
Litmus papers.

K.L.B. BK III
PP. 14-15

Longhorn Book III P 19
3

Openner exams

3 4
GAS LAWS
Rates of diffusion.
Graham?s Law.
By the end of the lesson, the learner should be able to:
Compare rates of diffusion of ammonia gas and hydrogen chloride in air.
Teacher demonstration: - To deduce rate of diffusion of ammonia gas and hydrogen chloride.
Q/A: - Students calculate ratio of rates of diffusion of the gases.
student book
Calculators
K.L.B.
BK III
PP. 18-19
Longhorn Book III 21
3 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
4 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
4 2-3
THE MOLE
Relative molecular mass & Relative formula mass.
Moles and Avogadro?s number.
Empirical Formula.
By the end of the lesson, the learner should be able to:
Define relative molecular mass.
Calculate RMM of a compound.
Calculate number of particles in a given number of moles.
Q/A: - Review formulae of compounds.
Complete a table of compounds and their molecular / formula mass.

Review standard form of numbers.
Worked examples.
Supervised exercise.

Calculators.
Calculators.
student book
K.L.B.BK III
PP. 34-35

Longhorn Book III PP 44-60

K.L.B.BK III
PP. 3132
Longhorn
Book III
PP 30-31
4 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
4 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
5 1
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.
Q/A: - Equivalent ratios, e.g. 4g dissolved in 500cm? and
8g in 1 litre.
Worked examples on concentration of solutions.
chart
student book
K.L.B. BK III
PP. 46-48

Longhorn Book III PP 76-81
5 2-3
THE MOLE
Preparation of molar solutions.
Calculators on molar solutions.
Dilution of solutions.
By the end of the lesson, the learner should be able to:
Define molar solutions.
Prepare molar solutions.
Solve numerical calculations on molar solutions.
Problems on molar solutions.
Q/A: - Description of preparation of molar solutions.

Worked examples.
Supervised exercise.
Assignment.
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

K.L.B. BK III
P 51
Longhorn Book III PP 76-81
5 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
5 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
6 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
6 2-3
Volumetric Analysis.
Apparatus used in titration experiments.
Titration process.
Titration experiment (Neutralization reaction)
By the end of the lesson, the learner should be able to:
To use and read a pipette and a burette.
To carry out a titration experiment and obtain accurate results.
Discussion and practical use of the apparatus.
Emphasis is laid on need to sterilize the apparatus after use.

Class experiments: - To neutralize HCl with NaOH solution.
Fill in a table of results.
Find the average base used.
Pipettes
Burettes.
Indicators
Suitable acid and base.
student book
K.L.B. BK III
PP. 63-64
Longhorn
Book III
PP 104-8

K.L.B. BK III
P. 66

Longhorn Book III PP 108-114
6 4
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
6 5
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.
Step-by-step calculations.
Calculators.
student book
K.L.B. BK III
P 66
Longhorn Book III PP 108-114
7 1
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
7 2-3
Volumetric Analysis.
Concentration of HCl.
Redox Titration Reactions.
By the end of the lesson, the learner should be able to:
To calculate concentration of HCl from experimental results.
To standardize a solution with an iron (II) salt.
Calculations & supervised practice.
Experiment and calculations.

Potassium Magnate
(VII)
K.L.B. BK III
PP. 74-75
K.L.B. BK III
PP. 74-75

Longhorn
Book III
PP 114-115
7 4
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
7 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
8 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
8 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
8 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
8 5
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
9

Midterm exams and midterm break

10 1
ORGANIC CHEMISTRY (I)
Alkanes.
Naming 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.
student book
K.L.B. BK III
PP. 93-94

Longhorn
Book III
PP 135-6
10 2-3
ORGANIC CHEMISTRY (I)
Members of Alkane series.
Isomerism in alkanes.
Laboratory preparation of a given alkane.
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.
Sodium ethanoate, sodalime,
Pestle and mortar.
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
10 4
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
10 5
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.
Discussion
Examples of balanced equations.
student book
K.L.B. BK III
P. 107
Longhorn
Book III
PP 148-9
11 1
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
11 2-3
ORGANIC CHEMISTRY (I)
Naming alkenes.
Alkene isomerism.
Preparing ethene in the lab.
By the end of the lesson, the learner should be able to:
To name various alkenes.
To describe lab preparation of ethene.
Q/Q: Nomenclature in alkenes.
Compare alkenes; hence deduce names of various alkenes.

Teacher demonstration: - Carry out tests on ethene as students note down the observations in a table.
student book
chart
K.L.B. BK III
PP. 110-113
Longhorn
Book III
PP 154-6


K.L.B. BK III
P 162
11 4
ORGANIC CHEMISTRY (I)
Physical properties of ethene.
Chemical 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
charts
K.L.B. BK III
PP. 116-117
Longhorn Book III
PP 126-129
165-6
11 5
ORGANIC CHEMISTRY (I)
Alkenes and oxidizing agents.
By the end of the lesson, the learner should be able to:
To describe reactions of alkenes with oxidizing agents.
Review the double bonds in alkenes.
Review reduction process, oxidizing agent.
Discuss reactions of alkenes with conc. H2SO4, acidified potassium chromate.
Expose hydrolysis process.

charts

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


Longhorn
Book III
PP 166-8
12 1
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
12 2-3
ORGANIC CHEMISTRY (I)
Alkynes. Nomenclature.
Isomerism in alkynes.
By the end of the lesson, the learner should be able to:
To identify various alkynes.
To name and draw structures of alkynes.
To draw structure showing positional and branching isomerism.
Discuss a table of members of alkynes.
Review naming of alkanes and alkene and compare this with naming of alkynes.

Discussion and drawing structures.
charts
K.L.B. BK III
P. 122-123
Longhorn
Book III
PP 126-129 171-5

K.L.B. BK III
PP. 124-125
Longhorn
Book III
PP 176-8
12 4
ORGANIC CHEMISTRY (I)
Physical properties of ethyne.
Chemical 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 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
13-14

End term exams and closing


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