WAEC Chemistry Practical Past Questions :- Are you preparing for WAEC and looking for Chemistry Practical past questions for 2025? If you’ve been asking questions like “What comes out in WAEC Chemistry practical?”, “How is the practical structured?”, or “How can I score high in practical?”, then this guide is for you. West African Examinations Council Chemistry practical is a very important part of the exam that tests your ability to carry out experiments, make observations, and draw correct conclusions. Practicing past questions will help you understand the format and improve your performance.
In this article, you will see sample WAEC Chemistry Practical past questions for 2025, including titration and qualitative analysis.
About WAEC Chemistry Practical
WAEC Chemistry Practical focuses on:
- Volumetric analysis (Titration)
- Qualitative analysis (Identification of substances)
- Observation and inference
- Use of laboratory apparatus
- Calculations and accuracy
The practical exam tests your ability to follow instructions, record results, and interpret data correctly.
WAEC Chemistry Practical Questions 2025
Answer all questions. Record your observations and inferences clearly.
Question 1 (Volumetric Analysis)
You are provided with the following:
- Solution A (an acid)
- Solution B (a base)
- Methyl orange indicator
(a) Pipette 25.0 cm³ of solution A into a conical flask.
(b) Add 2–3 drops of methyl orange indicator.
(c) Titrate with solution B from a burette until the colour changes.
(d) Repeat the titration to obtain two concordant readings.
(e) Record your readings in the table below:
| Titration | Final Reading (cm³) | Initial Reading (cm³) | Volume Used (cm³) |
|---|---|---|---|
| I | |||
| II | |||
| III |
(f) Calculate the average titre.
(g) Using your result, calculate the concentration of solution B.
Question 2 (Qualitative Analysis – Solid Sample)
You are provided with solid C.
Carry out the following tests and record your observations and inferences.
| Test | Observation | Inference |
|---|---|---|
| (a) Add water to C | ||
| (b) Add dilute HCl | ||
| (c) Heat strongly | ||
| (d) Add NaOH solution |
Question 3 (Qualitative Analysis – Solution)
You are provided with solution D.
Carry out the following tests:
| Test | Observation | Inference |
|---|---|---|
| (a) Add NaOH solution | ||
| (b) Add excess NaOH | ||
| (c) Add ammonia solution | ||
| (d) Add dilute acid |
Question 4
(a) Define a standard solution.
(b) Describe how you would prepare a standard solution of sodium chloride.
(c) State two precautions to be taken during titration.
Question 5
(a) Identify the apparatus used to measure:
(i) 25 cm³ accurately
(ii) Variable volumes
(b) State the function of the following:
(i) Burette
(ii) Pipette
(iii) Conical flask
Question 6
(a) What is a concordant reading?
(b) State two sources of error in titration.
(c) Explain how to minimize one of the errors.
How to Use WAEC Practical Past Questions Effectively
To succeed in WAEC Chemistry Practical:
- Practice titration calculations regularly
- Learn common colour changes (e.g., methyl orange, phenolphthalein)
- Understand common ions and their reactions
- Record observations clearly and correctly
- Practice using lab apparatus
Important Information
- WAEC practical questions are often repeated in similar formats
- Accuracy and neatness are very important
- Observations must be correctly recorded
- Calculations must be clearly shown
- Time management is key during the exam
Conclusion
Practicing WAEC Chemistry Practical past questions for 2025 is one of the most effective ways to prepare for the exam. It helps you understand the structure of practical questions and improves your confidence in handling experiments.
By practicing regularly, you become familiar with titration, qualitative analysis, and calculations. This helps you avoid mistakes and perform better during the exam.
Frequently Asked Questions (FAQs)
Is WAEC Chemistry practical difficult?
No, it is not difficult if you practice regularly and understand the procedures. Most questions follow a familiar pattern.
What type of questions come out in WAEC Chemistry practical?
Common questions include titration (volumetric analysis) and qualitative analysis of unknown substances.
How can I pass WAEC Chemistry practical?
Practice past questions, understand observations, and learn how to use laboratory equipment correctly.
Is calculation important in Chemistry practical?
Yes, calculations (especially in titration) are very important and can carry a lot of marks.
How can I avoid errors during practical?
Read instructions carefully, take accurate measurements, and avoid parallax error when reading instruments.
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