Likely WAEC GCE Chemistry Practical Questions and Answers 2025/2026 (Complete Solution) – Many candidates struggle with the WAEC Chemistry Practical (Alternative A and B) because they do not fully understand how to approach the questions.
In this guide, I will show you the most effective way to answer the 2025 WAEC GCE Chemistry Practical questions so you can perform confidently and secure an excellent grade in your Chemistry examination.
It is important to understand the WAEC GCE Chemistry Practical marking scheme before attempting any question. This helps you present your answers clearly and in a manner that appeals to the examiner, increasing your chances of scoring high marks.
Remember that every step in your procedure carries marks, so avoid skipping any stage while carrying out the experiment or recording your results.
click here to get full 2025 waec chemistry practical questions and answers (expo)
The WAEC GCE Chemistry Practical paper is usually divided into two main sections:
Quantitative Analysis – involving titration and numerical calculations.
Qualitative Analysis – focusing on the identification of ions through observations and inferences.
You will perform the required experiments and accurately record what you observe, followed by the correct inferences. The practical exercises you meet will be similar to the Chemistry specimens provided to your school beforehand.
Note: Your Chemistry teacher will provide the specific titration endpoint for your center. This value differs from one school to another but always falls within an acceptable range.
Do not rely on the endpoint shown here, as it may not match the one you are given. Instead, focus on understanding and applying the calculation steps.
WAEC GCE Practical Chemistry Questions and Answers (Expo)
The 2025 WAEC GCE Chemistry Practical updates will be provided here during the examination period.
2023 GCE Practical Chemistry – Alternative B (Guide)
Always apply your school’s titration endpoint in every calculation.
Wherever the sample endpoint 20.4 cm³ appears, replace it with the value given at your own centre and use that for your workings.
For question 1(b)(ii), simply substitute your school’s endpoint in place of the sample 20.4 cm³ before calculating.
If your school decides to follow the sample value, the Chemistry teacher must ensure the submitted endpoint is very close to it—for example: 20.40, 20.45, 20.30, etc.
WAEC GCE Practical Chemistry Questions and Answers (Expo) Alternative A
For Question 1, always work with your school’s titration endpoint.
Wherever the sample endpoint 15.15 cm³ appears, replace it with the value provided at your centre and use that for your calculations.
In Question 1(b), simply substitute your school’s endpoint in place of the sample 15.15 cm³ before carrying out the calculation.
Your Chemistry teacher will submit an endpoint that matches the value he or she provides during the practical session.
WAEC GCE Practical Chemistry Practice Questions
Remember to record all burette readings (initial and final) as well as the pipette volume used.
You do not need to write out the experimental procedure, but all calculations must be done in your answer booklet.
1. Quantitative Analysis
You are provided with:
A: a solution of potassium tetraoxomanganate(VII)
B: a solution of iron(II) chloride containing 4.80 g of the salt dissolved in 250 cm³ of solution
(a)
Fill the burette with solution A.
Pipette 20.0 cm³ or 25.0 cm³ of solution B into a conical flask, add 20.0 cm³ of dilute H₂SO₄, and titrate with A.
Repeat the titration until you obtain concordant titres.
Present your readings in a table and determine the average volume of A used.
The reaction equation is:
MnO4−(aq)+5Fe2+(aq)+8H+(aq)→Mn2+(aq)+5Fe3+(aq)+4H2O(l)\text{MnO}_4^- (aq) + 5\text{Fe}^{2+}(aq) + 8\text{H}^+ (aq) \rightarrow \text{Mn}^{2+}(aq) + 5\text{Fe}^{3+}(aq) + 4\text{H}_2\text{O}(l)
(b) Using your results and the information provided, calculate:
(i) the concentration of B in mol dm⁻³
(ii) the concentration of A in mol dm⁻³
(iii) the number of moles of Fe²⁺ in the volume of B pipetted
(Relative formula mass: FeCl₂ = 127 g mol⁻¹)
Note: Marks will be awarded for accurate observations, correct recording, and clear inferences. All observations and inferences must be written in ink at the time they are made.
2. Qualitative Analysis
You are provided with two inorganic salts: C and D.
Carry out the following tests carefully, record all observations, note any gas(es) evolved, and state the conclusions drawn.
(a) Tests on C
Place the entire sample of C into a test tube.
Add about 5 cm³ of distilled water, shake well, and test the solution with litmus paper.
Divide the solution into three portions:
First portion: Add NaOH(aq) dropwise, then in excess.
Second portion: Add NH₃(aq) dropwise, then in excess.
Third portion: Add AgNO₃(aq), followed by HCl(aq).
(b) Tests on D
(i) Place all of D in a test tube and add about 5 cm³ of distilled water. Shake thoroughly and feel the outside of the test tube.
(ii) To about 2 cm³ of the resulting solution, add dilute HCl(aq).
