WAEC 2026 CHEMISTRY ANSWERS (ALT. B PRACTICAL)

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(1)

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(2)

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(3ai)
Burette readings are taken at eye level to avoid parallax error and ensure accurate reading of the liquid meniscus.

(3aii)
Funnel is removed before taking the initial burette reading to prevent any drops of solution remaining in the funnel from flowing into the burette during titration, which would alter the volume reading and cause inaccurate results.

(3aiii)
Burette is rinsed with the acid solution to remove any water or impurities in the burette that could dilute the acid solution and affect its concentration.

(3b)
(i) Volumetric flask
(ii) Beaker
(iii) Weighing balance (or chemical balance)
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