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SCHEME OF WORK
Chemistry
Form 4 2025
TERM III
School


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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1 4
METALS
Chemical Properties I - Reaction with Air
By the end of the lesson, the learner should be able to:
Investigate metal reactions with air and oxygen
- Write balanced equations for metal oxidation
- Compare reactivity patterns
- Explain tarnishing and oxide formation
Experiment 5.1: Heat metals in air - sodium, aluminium, zinc, iron, copper
- Observe color changes and products
- Record observations in Table 5.3
- Write oxidation equations
Deflagrating spoons, metal samples (Na, Al, Zn, Fe, Cu), Bunsen burners, safety equipment
KLB Secondary Chemistry Form 4, Pages 152-154
1 5
METALS
Chemical Properties II - Reaction with Water
By the end of the lesson, the learner should be able to:
Test metal reactions with cold water and steam
- Arrange metals by reactivity
- Explain aluminium's apparent unreactivity
- Write chemical equations for reactions
Experiment 5.2: Test metals with cold water and steam
- Use Table 5.4 for observations
- Test solutions with indicators
- Arrange metals in reactivity order
Metal samples, cold water, steam generator, test tubes, universal indicator, safety equipment
KLB Secondary Chemistry Form 4, Pages 154-156
1 6
METALS
Chemical Properties III - Reaction with Chlorine
By the end of the lesson, the learner should be able to:
Investigate metal reactions with chlorine gas
- Write equations for chloride formation
- Compare reaction vigor
- Observe product characteristics
Experiment 5.3: React hot metals with chlorine gas (FUME CUPBOARD)
- Observe color changes and fume formation
- Record all observations
- Write balanced equations
Chlorine gas, gas jars, metal samples, tongs, deflagrating spoons, fume cupboard, safety equipment
KLB Secondary Chemistry Form 4, Pages 156-157
2 1
METALS
Chemical Properties IV - Reaction with Acids
By the end of the lesson, the learner should be able to:
Test metal reactions with dilute and concentrated acids
- Compare reaction patterns
- Write chemical equations
- Explain passivation effects
Experiment 5.4: Test metals with various acids - HCl, HNO₃, H₂SO₄
- Use Table 5.5 for systematic recording
- Observe gas evolution
- Discuss passivation
Various acids (dilute and concentrated), metal strips, test tubes, gas collection apparatus, safety equipment
KLB Secondary Chemistry Form 4, Pages 157-158
2 2
METALS
Uses of Metals I - Sodium and Aluminium
By the end of the lesson, the learner should be able to:
State uses of sodium and its compounds
- Explain aluminium applications
- Relate properties to uses
- Describe alloy formation and uses
Discussion on sodium uses in industry
- Aluminium applications in transport and construction
- Study duralumin and other alloys
- Property-use relationships
Charts showing metal applications, alloy samples, aircraft parts, cooking vessels
KLB Secondary Chemistry Form 4, Pages 158-159
2 3-4
METALS
Uses of Metals II - Zinc, Copper and Iron
By the end of the lesson, the learner should be able to:
Explain galvanization process
- Describe copper electrical applications
- Compare iron, steel, and cast iron uses
- Analyze alloy compositions and properties
Study galvanization and rust prevention
- Copper in electrical applications
- Different types of steel and their compositions
- Alloy property comparisons
Galvanized sheets, copper wires, steel samples, alloy composition charts, brass and bronze samples
KLB Secondary Chemistry Form 4, Pages 159-161
2 5
METALS
Steel Types and Alloys
By the end of the lesson, the learner should be able to:
Compare cast iron, wrought iron, and steel
- Analyze different steel compositions
- Explain alloy property enhancement
- Describe specialized steel applications
Study cast iron, wrought iron, mild steel, and stainless steel
- Analyze carbon content effects
- Specialized steels for tools and instruments
- Discussion on alloy design
Steel samples with different compositions, carbon content charts, specialized tools, stainless steel items
KLB Secondary Chemistry Form 4, Pages 159-161
2 6
METALS
Environmental Effects of Metal Extraction
By the end of the lesson, the learner should be able to:
Identify environmental impacts of mining
- Explain pollution from metal extraction
- Describe waste management strategies
- Discuss NEMA regulations in Kenya
Analysis of mining environmental impact
- Air, water, and land pollution from extraction
- Waste management and slag utilization
- NEMA role and regulations
Environmental impact case studies, pollution images, NEMA regulation documents, waste management examples
KLB Secondary Chemistry Form 4, Pages 161-162
3 1
REVISION

Chemistry Paper 1 Revision
Chemistry Paper 1 Revision
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts
KLB Chemistry Bk 1–4, KCSE Past Papers
3 2
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations
By the end of the lesson, the learner should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
KCSE Past Papers, Teachers’ Guide
3 3-4
Chemistry Paper 2 Revision
Chemistry Paper 3 Revision
Structured Questions: Calculations & Reactions
Integrated Exam Practice
Quantitative Practical Skills
By the end of the lesson, the learner should be able to:
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Calculators, Revision Exercises, Charts
Past Papers, Marking Schemes, Exam Answer Sheets
Laboratory apparatus, Past Papers
KCSE Past Papers, Revision Kits
KLB Chem Bk 1–4, KCSE Past Papers
3 5
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision
Qualitative Practical Skills
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
Laboratory apparatus, Reagents, Past Papers
Past Chemistry Paper 1 exams, Marking Schemes
KLB Chem Bk 1–4, KCSE Past Papers
3 6
Chemistry Paper 1 Revision
Section A: Short Answer Questions
Integrated Short Answer Practice
By the end of the lesson, the learner should be able to:
– practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
Past Papers, Chalkboard, Chemistry Charts
Full Past Paper 1, Answer Booklets, Marking Schemes
KLB Chemistry Bk 1–4
4-5

POST MOCK

5 5
Chemistry Paper 2 Revision
Structured Questions: Analysis & Explanations
By the end of the lesson, the learner should be able to:
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
KLB Chem Bk 2–4, KCSE Past Papers
5 6
Chemistry Paper 2 Revision
Structured Questions: Calculations & Reactions
Integrated Exam Practice
By the end of the lesson, the learner should be able to:
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
Calculators, Revision Exercises, Charts
Past Papers, Marking Schemes, Exam Answer Sheets
KCSE Past Papers, Revision Kits
6 1
Chemistry Paper 3 Revision
Quantitative Practical Skills
Qualitative Practical Skills
By the end of the lesson, the learner should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
6 2
Chemistry Paper 1 Revision
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Past Chemistry Paper 1 exams, Marking Schemes
KLB Chemistry Bk 1–4, KCSE Past Papers
6 3-4
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision
Section A: Short Answer Questions
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations
Structured Questions: Calculations & Reactions
By the end of the lesson, the learner should be able to:
– practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
Past Papers, Chalkboard, Chemistry Charts
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Calculators, Revision Exercises, Charts
KLB Chemistry Bk 1–4
KLB Chem Bk 2–4, KCSE Past Papers
6 5
Chemistry Paper 2 Revision
Integrated Exam Practice
By the end of the lesson, the learner should be able to:
- integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas
Past Papers, Marking Schemes, Exam Answer Sheets
KLB Chem Bk 1–4, KCSE Past Papers
6 6
Chemistry Paper 3 Revision
Quantitative Practical Skills
Qualitative Practical Skills
By the end of the lesson, the learner should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
7 1
Chemistry Paper 1 Revision
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts
KLB Chemistry Bk 1–4, KCSE Past Papers
7 2
Chemistry Paper 1 Revision
Integrated Short Answer Practice
By the end of the lesson, the learner should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Full Past Paper 1, Answer Booklets, Marking Schemes
KCSE Past Papers, Teachers’ Guide
7 3-4
Chemistry Paper 2 Revision
Chemistry Paper 2 Revision
Chemistry Paper 3 Revision
Structured Questions: Analysis & Explanations
Structured Questions: Calculations & Reactions
Integrated Exam Practice
Quantitative Practical Skills
By the end of the lesson, the learner should be able to:
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions
- integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Calculators, Revision Exercises, Charts
Past Papers, Marking Schemes, Exam Answer Sheets
Laboratory apparatus, Past Papers
KLB Chem Bk 2–4, KCSE Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
7 5
Chemistry Paper 3 Revision
Qualitative Practical Skills
By the end of the lesson, the learner should be able to:
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
7 6
Chemistry Paper 1 Revision
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts
KLB Chemistry Bk 1–4, KCSE Past Papers
8 1
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations
By the end of the lesson, the learner should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
KCSE Past Papers, Teachers’ Guide
8 2
Chemistry Paper 2 Revision
Structured Questions: Calculations & Reactions
By the end of the lesson, the learner should be able to:
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
Calculators, Revision Exercises, Charts
KCSE Past Papers, Revision Kits
8 3-4
Chemistry Paper 2 Revision
Chemistry Paper 3 Revision
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision
Integrated Exam Practice
Quantitative Practical Skills
Qualitative Practical Skills
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
- integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
Past Papers, Marking Schemes, Exam Answer Sheets
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers
Past Chemistry Paper 1 exams, Marking Schemes
KLB Chem Bk 1–4, KCSE Past Papers
8 5
Chemistry Paper 1 Revision
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
– practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
Past Papers, Chalkboard, Chemistry Charts
KLB Chemistry Bk 1–4
8 6
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations
By the end of the lesson, the learner should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
KCSE Past Papers, Teachers’ Guide
9 1
Chemistry Paper 2 Revision
Structured Questions: Calculations & Reactions
Integrated Exam Practice
By the end of the lesson, the learner should be able to:
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
Calculators, Revision Exercises, Charts
Past Papers, Marking Schemes, Exam Answer Sheets
KCSE Past Papers, Revision Kits
9 2
Chemistry Paper 3 Revision
Quantitative Practical Skills
Qualitative Practical Skills
By the end of the lesson, the learner should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
9 3-4
Chemistry Paper 1 Revision
Section A: Short Answer Questions
Section A: Short Answer Questions
Integrated Short Answer Practice
By the end of the lesson, the learner should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations
– practice a variety of short-answer questions across different Chemistry topics – apply knowledge of experimental setups, chemical properties, and reactions – improve accuracy and clarity in responses
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts
Full Past Paper 1, Answer Booklets, Marking Schemes
KLB Chemistry Bk 1–4, KCSE Past Papers
9 5
Chemistry Paper 2 Revision
Structured Questions: Analysis & Explanations
Structured Questions: Calculations & Reactions
By the end of the lesson, the learner should be able to:
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Calculators, Revision Exercises, Charts
KLB Chem Bk 2–4, KCSE Past Papers
9 6
Chemistry Paper 2 Revision
Integrated Exam Practice
By the end of the lesson, the learner should be able to:
- integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas
Past Papers, Marking Schemes, Exam Answer Sheets
KLB Chem Bk 1–4, KCSE Past Papers
10 1
Chemistry Paper 3 Revision
Quantitative Practical Skills
Qualitative Practical Skills
By the end of the lesson, the learner should be able to:
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
10 2
Chemistry Paper 1 Revision
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Past Chemistry Paper 1 exams, Marking Schemes
Past Papers, Chalkboard, Chemistry Charts
KLB Chemistry Bk 1–4, KCSE Past Papers
10 3-4
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision
Integrated Short Answer Practice
Structured Questions: Analysis & Explanations
Structured Questions: Calculations & Reactions
By the end of the lesson, the learner should be able to:
– integrate knowledge from all Chemistry topics to solve mixed Paper 1 questions – practice time management under exam conditions – review answers using marking schemes and teacher feedback
- attempt structured questions systematically - interpret and explain concepts from the Periodic Table, gases, and bonding - apply scientific reasoning to short-answer questions
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
Full Past Paper 1, Answer Booklets, Marking Schemes
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Calculators, Revision Exercises, Charts
KCSE Past Papers, Teachers’ Guide
KLB Chem Bk 2–4, KCSE Past Papers
10 5
Chemistry Paper 2 Revision
Chemistry Paper 3 Revision
Integrated Exam Practice
Quantitative Practical Skills
By the end of the lesson, the learner should be able to:
- integrate knowledge across topics (organic, industrial, acids/bases, gases) - apply time management in answering compulsory Paper 2 questions - self-assess answers against marking scheme
Learners sit for a timed mock (selected Paper 2 questions) Peer marking guided by marking scheme Teacher highlights answering techniques and improvement areas
Past Papers, Marking Schemes, Exam Answer Sheets
Laboratory apparatus, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
10 6
Chemistry Paper 3 Revision
Qualitative Practical Skills
By the end of the lesson, the learner should be able to:
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers

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