Here are the 2024 WAEC May/June chemistry Practical (Alternative A & B ) Questions and Answers along with free live WAEC Chemistry (CHM) Practical questions and answers Expo room (Thursday, 20th June,2024) WASSCE Chemistry 3 (Practical) (Alternative A/B) questions and answers. It's important to note that this exam is open to both internal and external candidates
WASSCE 2024 Chemistry Practical (Alternative A & B) - EXPO
This year WASSCE Chemistry Practical (Alternative A & B) examination is derived from the National Curriculum for Senior Secondary School chemistry Practical, outlining the course scope for examinations at this level.
Thursday, 20th June, 2024
Chemistry 3 (Practical) (Alternative B) –
08:30 hrs. – 10:30 hrs. (1st Set) &
11:00 hrs. – 13:00 hrs. (2nd Set)
A). 2024 Chemistry Practical (Alternative A) (1st Set) Answers:
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(3a)
(i)ammonia (NH₃)
(ii)carbon dioxide (CO₂).
(3b)
(i)A graduated pipette
(ii) A burette can be used.
(3c)
A fume cupboard in a laboratory is used to provide ventilation that limits exposure to toxic fumes, vapors, or dust.
(3d)
(i)safety goggles.
(ii)lab coats.
(iii)gloves.
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WAEC 2024 chemistry Practical Questions paper :
B). 2024 Chemistry Practical (Alternative B) (2st Set) Answers:
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Last year 2023 WAEC CHEMISTRY PRACTICAL ANSWER:
TAKE NOTE
For question 1
Use your school's endpoint and use it wherever you see our endpoint (15.15cm³) ...and calculate with it
Replace our 15.15 in 1b and do the calculation.
If your school wants to use mine, then the chemistry teacher must submit endpoint similar to ours without much difference...eg 15.15, 15.20, 15.30, etc
NOTE
In (1ciii) u will multiply 0.1 with ur school's average titre value(endpoint).
You can see that we used 15.15 which is our titre value.
If your school's endpoint is 12.50
Your calculation will be 0.1 x 12.50 / 1000
No (3ai)
*Number 3a*
(i) If a few drops of NaOH solution are added to 2 cm^3 of a solution of Pb(NO3)2, a white precipitate of lead(II) hydroxide [Pb(OH)2] is formed. The balanced equation for the reaction is as follows:
Pb(NO3)2 + 2NaOH → Pb(OH)2 + 2NaNO3
(ii) If a few drops of NaOH solution are added to 2 cm^3 of a solution of Fe2(SO4)2, a green precipitate of iron(II) hydroxide [Fe(OH)2] is formed. However, on exposure to air, the Fe(OH)2 precipitate can be oxidized by atmospheric oxygen to form a reddish-brown precipitate of iron(III) hydroxide [Fe(OH)3]. The balanced equations for the reaction and the subsequent oxidation are as follows:
Fe2(SO4)2 + 4NaOH → 2Fe(OH)2↓ + Na2SO4
4Fe(OH)2 + O2 + 2H2O → 4Fe(OH)3
Therefore, the initial greenish precipitate of Fe(OH)2 will turn reddish-brown in color due to the oxidation to Fe(OH)3.
TAKE NOTE For (Question 1)
Use your school's endpoint and use it wherever you see our endpoint (15.15cm³) ...and calculate with it
Replace our 15.15 in 1b and do the calculation.
If your school wants to use mine, then the chemistry teacher must submit endpoint similar to ours without much difference...eg 15.15,
15.20, 15.30, etc
(1a)
Volume of pipette used, VA = 25.0cm³
Indicator Used = Methyl Orange
[TABULATE]
Burette Reading | Rough titre | 1st titre | 2nd titre |
Final Burette reading (cm³) | 25.60 | 32.80 | 26.40
Initial Burette reading (cm³) | 1.20 | 8.70 | 2.30
Volume of HCL used | 24.40 | 24.10 | 24.10
Average burette reading = (24.10 + 24.10)/2
volume of HCL used = 24.10cm³
Answers Loading ===========
WAEC 2023 CHEMISTRY PRACTICAL QUESTIONS (ALT. A & B) ANSWERS
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WAEC CHEMISTRY PRACTICAL 2024 SPECIMEN
1. Great care should be taken to ensure that the information given in the items 2 and 3 below does not reach the candidate either directly or indirectly before the examination.
2. In addition to the fittings and reagents normally found in a chemistry laboratory, the following apparatus and materials will be required by each candidate:
(a) One burette of 50 cm3 capacity;
(b) One pipette, either 20 cm3 or 25 cm3. (All candidates at one centre must use pipettes of the same volume. These should be clean and free from grease)
(c) The usual apparatus for titration;
(d) The usual apparatus and reagents for qualitative work including the following with all reagents appropriately labelled;
(i) Dilute sodium hydroxide solution;
(ii) Dilute hydrochloric acid;
(iii) Dilute trioxonitrate
(V) acid;
(iv) Silver trioxonitrate
(V) solution;
(v) Acidified potassium dichromate solution;
(vi) Aqueous ammonia;
(vii) Lime water;
(viii) Red and blue litmus paper
(ix) Dilute tetraoxosulphate (VI) acid;
(x) Fehlings solution A & B.
(e) Spatula;
(f) Filtration apparatus;
(g) One beaker
(h) One boiling tube;
(i) Four test tubes;
(j) Methyl orange as indicator;
(k) Glass rod;
(l) Wash bottle containing distilled/deionized water;
(m) Burning splint;
(n) Watch glass;
(o) Bunsen burner/source of heat;
(p) Droppers;
(q) Mathematical table/calculator.
3. Each candidate should be supplied with the following, where ‘n’ is the candidiate’s serial number
(a) 150 cm3 of a solution of HCl in a corked flask or bottle labelled ‘An’. These should all be the same containing 8.5 cm3 of concentrated HCl per dm3 of solution.
(b) 150 cm3 of Na2CO3.10 H2O in a corked flask or bottle labelled ‘Bn’. These should all be the same containing 5.0 g of the hydrated salt per dm3 of solution.
(c) One spatulaful of glucose in a specimen bottle labelled ‘Cn’. This must be the same for all candidates.
(d) One spatulaful of zinc oxide powder in a specimen bottle labelled ‘Dn’. This must be same for all candidate.
WAEC 2023 CHEMISTRY PRACTICAL ANSWERS
How To Pass 2024 Waec Chemistry Practical Alternative Question and Answers
To pass the WAEC Chemistry Practical exam, I can offer you some general tips:
- Study the syllabus: Review the WAEC Chemistry syllabus to understand the topics and practical exercises that may be covered in the exam. Pay attention to the required laboratory techniques and procedures.
- Practice experiments: Set up a makeshift laboratory at home or utilize your school's laboratory facilities to practice the practical experiments outlined in the syllabus. Perform the experiments following the instructions and record your observations and results accurately.
- Understand concepts and theories: Study the theoretical aspects of Chemistry to have a solid understanding of the principles behind the practical experiments. This will help you explain the purpose, expected outcomes, and underlying theories during the exam.
- Safety precautions: Familiarize yourself with safety measures and precautions in the laboratory. Be aware of proper handling and disposal of chemicals, use safety equipment such as goggles and lab coats, and follow all guidelines to ensure a safe environment.
- Time management: During the exam, manage your time effectively. Read the instructions carefully, plan your approach for each experiment, and allocate time accordingly. Be mindful of the time available and try to complete all tasks within the given duration.
- Review past papers: Solve previous years' WAEC Chemistry Practical papers to get acquainted with the format and types of questions asked. This will give you an idea of the level of difficulty and help you identify areas where you need more practice.
- Seek guidance: If you're having difficulty with specific concepts or experiments, don't hesitate to reach out to your teacher or instructor for clarification. They can provide additional guidance and support to help you better understand the material.
Remember, the key to success in any exam is thorough preparation, understanding of the subject matter, and following ethical practices. Focus on building your knowledge, practicing experiments, and applying critical thinking skills during the exam.
Best of luck with your studies and the 2024 WAEC Chemistry Practical exam
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