Module 3: Chemistry
Acids, bases, indicators, and pH scale.
Use this workbook to practice core KCSE communication skills and record evidence of progress.
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SECTION: CHEMISTRY
MODULE: 3
Part A: Units
1. Acids, bases and indicators
a. Plant extracts as indicators
b. Common acid-base indicators
c. Universal indicator and pH scale
d. Properties of acids and bases
e. Uses of acids and bases
Part B: Project
Test acids and bases using indicators.
Project Title: Acids, Bases, and Indicators
Objective: Identify acids and bases using common indicators and explain their properties.
Project Instructions:
- 1. Collect three household substances (e.g., lemon juice, soap, baking soda).
- 2. Use a plant extract or common indicator to test each substance.
- 3. Record color changes and infer acidic or basic nature.
- 4. Match results to the pH scale where possible.
- 5. Consult your coach where necessary.
Evidence to Submit:
- • Indicator results table.
- • Classification of substances as acids or bases.
- • Short notes on properties and uses.
Submission
Part C: Training Others
Teach a peer about acids, bases, and indicators.
Guidance:
- • Explain the pH scale and indicator color changes.
- • Demonstrate one test using an indicator.
- • Ask the learner to classify one substance.
Reflection:
- • What did the learner understand well?
- • What was confusing?
- • What support do you need from your coach?
Submission
Part D: Assessment
Competency Levels:
1 = Expectations not met
2 = Partially met
3 = Satisfactorily met
4 = Excellently met
Self-assessment:
- • Indicators and pH scale:
- • Properties of acids and bases:
- • Uses of acids and bases:
Coach assessment:
- • Indicators and pH scale:
- • Properties of acids and bases:
- • Uses of acids and bases:
Submission
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