2025 WAEC CHEMISTRY: WAEC Chemistry (Chems) 2026 Practical Legit Questions and Answers (6945)

TEACHERS REPORT:

(2)

(a) 8.6

(b) 8.0

(3)

(i) 26.3

(ii) 26.4

(iii) 26. 3

Average 26.33

IMPORTANT INFORMATION

For Question 1:

Use your school’s endpoint in place of ours (26.33 cm³) for all related calculations.

In 1b(ii), replace 26.33 with your school’s endpoint and solve.

Use the result (CB) from 1b(ii) in 1b(iii). For example, we got 0.0952 using our 26.33 cm³ — use your own CB value instead.

We used our 0.0952 in 1b(iii) to get 8.0. Replace that 8.0 in 1b(iv) with your own 1b(iii) result and calculate your percentage.

Chemistry students should understand this. Teachers are expected to guide.

If your school wants to use our values, the teacher must submit an endpoint close to ours — e.g., 26.10, 26.20, 26.30, 26.40, etc.

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CHEMISTRY PRACTICAL SPECIMEN

(1) Great care should be taken to ensure that the information given in items 2 and 3 below does not reach the candidates either directly or indirectly before the examination.

(2) In addition to the fittings and reagents normally contained in a Chemistry laboratory, the following apparatus and materials will be required by each candidate:

(a) one burette of 50.0 cm³ capacity;

(b) one pipette, either 20.0 cm³ or 25.0 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) aqueous barium chloride

(vi) aqueous ammonia

(vii) lime water

(viii) red and blue litmus papers

(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 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;

(r) phenolphthalein indicator.

(3) Each candidate should be supplied with the following, where n is the candidate’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 8.6 cm³ of concentrated HCI per dm³ of solution

(b) 150 cm³ of NaHCO, solution in a corked flask or bottle labelled ’Bn’. These should all be the same containing 8.0 g of NaHCO3 per dm³ of solution.

(c) One spatulaful of 1:1 uniform mixture of copper (II) tetraoxosulphate (VI) and glucose in a specimen bottle labelled ’Cn’. This must be the same for all candidates

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