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Chemistry
Form 4 2026
TERM III
School


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WK LSN TOPIC SUB-TOPIC OBJECTIVES T/L ACTIVITIES T/L AIDS REFERENCE REMARKS
1

OPENING

1 5
ELECTROCHEMISTRY
Faraday's Laws and Quantitative Electrolysis
By the end of the lesson, the learner should be able to:
State Faraday's laws of electrolysis
- Define Faraday constant
- Calculate mass deposited in electrolysis
- Relate electricity to amount of substance
In groups, learners are guided to:
Experiment 4.10: Quantitative electrolysis of CuSO₄
- Measure mass vs electricity passed
- Calculate Faraday constant
- Verify Faraday's laws
Accurate balance, copper electrodes, CuSO₄ solution, ammeter, timer, calculators
KLB Secondary Chemistry Form 4, Pages 161-164
2 1
ELECTROCHEMISTRY
Electrolysis Calculations I
By the end of the lesson, the learner should be able to:
Calculate mass of products from electrolysis
- Determine volumes of gases evolved
- Apply Faraday's laws to numerical problems
- Solve basic electrolysis calculations
In groups, learners are guided to:
Worked examples: Mass and volume calculations
- Problems involving different ions
- Practice with Faraday constant
- Basic numerical problems
Calculators, worked examples, practice problems, gas volume data, Faraday constant
KLB Secondary Chemistry Form 4, Pages 161-164
2 2-3
ELECTROCHEMISTRY
Electrolysis Calculations I
By the end of the lesson, the learner should be able to:
Calculate mass of products from electrolysis
- Determine volumes of gases evolved
- Apply Faraday's laws to numerical problems
- Solve basic electrolysis calculations
In groups, learners are guided to:
Worked examples: Mass and volume calculations
- Problems involving different ions
- Practice with Faraday constant
- Basic numerical problems
Calculators, worked examples, practice problems, gas volume data, Faraday constant
KLB Secondary Chemistry Form 4, Pages 161-164
2 4
ELECTROCHEMISTRY
Electrolysis Calculations II
By the end of the lesson, the learner should be able to:
Determine charge on ions from electrolysis data
- Calculate current-time relationships
- Solve complex multi-step problems
- Apply concepts to industrial situations
In groups, learners are guided to:
Complex problems: Determine ionic charges
- Current-time-mass relationships
- Multi-step calculations
- Industrial calculation examples
Calculators, complex problem sets, industrial data, student books
KLB Secondary Chemistry Form 4, Pages 161-164
2 5
ELECTROCHEMISTRY
Electrolysis Calculations II
By the end of the lesson, the learner should be able to:
Determine charge on ions from electrolysis data
- Calculate current-time relationships
- Solve complex multi-step problems
- Apply concepts to industrial situations
In groups, learners are guided to:
Complex problems: Determine ionic charges
- Current-time-mass relationships
- Multi-step calculations
- Industrial calculation examples
Calculators, complex problem sets, industrial data, student books
KLB Secondary Chemistry Form 4, Pages 161-164
3 1
ELECTROCHEMISTRY
Advanced Applications and Problem Solving
By the end of the lesson, the learner should be able to:
Solve examination-type electrochemistry problems
- Apply all concepts in integrated problems
- Analyze real-world electrochemical processes
- Practice complex calculations
In groups, learners are guided to:
Comprehensive problems combining redox, cells, and electrolysis
- Past examination questions
- Industrial case study analysis
- Advanced problem-solving techniques
Past papers, comprehensive problem sets, industrial case studies, calculators
KLB Secondary Chemistry Form 4, Pages 108-164
3 2-3
ELECTROCHEMISTRY
REVISION

Chemistry Paper 1 Revision
Advanced Applications and Problem Solving
Section A: Short Answer Questions
By the end of the lesson, the learner should be able to:
Solve examination-type electrochemistry problems
- Apply all concepts in integrated problems
- Analyze real-world electrochemical processes
- Practice complex calculations
– attempt compulsory short-answer questions – recall and explain key chemistry concepts clearly – apply correct working in simple chemical calculations
In groups, learners are guided to:
Comprehensive problems combining redox, cells, and electrolysis
- Past examination questions
- Industrial case study analysis
- Advanced problem-solving techniques
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Past papers, comprehensive problem sets, industrial case studies, calculators
Past Chemistry Paper 1 exams, Marking Schemes
KLB Secondary Chemistry Form 4, Pages 108-164
KLB Chemistry Bk 1–4, KCSE Past Papers
3 4
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
In groups, learners are guided to:
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
3 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
4 1
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
4 2-3
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
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
4 4
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
4 5
Chemistry Paper 3 Revision
Quantitative 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
KLB Chem Bk 1–4, KCSE Past Papers
5 1
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
5 2-3
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
– 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
In groups, learners are guided to:
Teacher demonstrates answering approaches Students work in groups to discuss selected questions Class review using marking scheme
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Past Papers, Chalkboard, Chemistry Charts
Full Past Paper 1, Answer Booklets, Marking Schemes
KLB Chemistry Bk 1–4
KCSE Past Papers, Teachers’ Guide
5 4
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 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
6 1
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
6 2-3
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
- make accurate observations during experiments - record results clearly and systematically - draw correct inferences from experimental outcomes
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
Laboratory apparatus, Past Papers
Laboratory apparatus, Reagents, Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
6 4
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
6 5
Chemistry Paper 3 Revision
Quantitative 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
KLB Chem Bk 1–4, KCSE Past Papers
7 1
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 2-3
Chemistry Paper 2 Revision
Chemistry Paper 3 Revision
Structured Questions: Analysis & Explanations
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
- apply correct laboratory techniques in measuring and mixing solutions - record results systematically and accurately - analyze practical data to make valid conclusions
Learners attempt selected structured questions Teacher guides marking and discusses common errors Class shares strategies for improving explanations
Teacher reviews quantitative procedures Learners practice measurement and recording Class discussion on data presentation and interpretation
Past Chemistry Paper 2 exams, Marking Schemes, Whiteboard
Laboratory apparatus, Past Papers
KLB Chem Bk 2–4, KCSE Past Papers
KLB Chem Bk 1–4, KCSE Past Papers
7 4
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 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
8 1
Chemistry Paper 3 Revision
Quantitative 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
KLB Chem Bk 1–4, KCSE Past Papers
8 2-3
Chemistry Paper 3 Revision
Chemistry Paper 1 Revision
Qualitative Practical Skills
Integrated Short Answer Practice
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
– 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
Teacher demonstrates step-by-step approach to qualitative tasks Learners carry out tests in groups Group review of observations vs. inferences
Students attempt a timed set of Paper 1 questions (mock) Teacher leads whole-class marking and discussion of common errors
Laboratory apparatus, Reagents, Past Papers
Full Past Paper 1, Answer Booklets, Marking Schemes
KLB Chem Bk 1–4, KCSE Past Papers
KCSE Past Papers, Teachers’ Guide
8 4
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
8 5
Chemistry Paper 3 Revision
Quantitative 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
KLB Chem Bk 1–4, KCSE Past Papers
9 1
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
9 2-3
Chemistry Paper 1 Revision
Chemistry Paper 2 Revision
Section A: Short Answer Questions
Structured Questions: Calculations & Reactions
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
- solve questions involving mole ratios, empirical formulae, titration, and gas laws - write and balance chemical equations - present working clearly for full marks
Students attempt selected short-answer questions individually Peer-marking and teacher correction through discussion
Learners attempt numerical and equation-based questions in groups Teacher reviews answers using marking scheme Class discussion of calculation shortcuts and common pitfalls
Past Chemistry Paper 1 exams, Marking Schemes
Calculators, Revision Exercises, Charts
KLB Chemistry Bk 1–4, KCSE Past Papers
KCSE Past Papers, Revision Kits
9 4
Chemistry Paper 3 Revision
Quantitative 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
KLB Chem Bk 1–4, KCSE Past Papers
9 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
10

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