NECO 2018 chemistry practical specimen

CHEMISTRY PRACTICAL SPECIMEN:

Requirements:
(a) One burette (50cm3)

(b) One pippete (20cm3/25cm3). However, all candidates in a center must use pipettes of the same volume.

(c) The usual apparatus and reagents for qualitative work including:
(i) Dilute sodium hydroxide solution
(ii) Dilute ammonia solution
(iii) Dilute hydrochloric acid
(iv) Distilled water
(v) Red and Blue litmus paper
(vi) Barium chloride solution
(vii) Phenolphtalein

(d) Methyl orange

(e) One boiling tube

(f) Five test tubes

(g) Filtration

(h) Source of heat

Each candidate should be supplied with the following: Labelled An, Bn, Cn, where n is the candidate’s serial number.

(a) 150cm3 of chloride acid solution in a bottle labelled An . The acid solution which should be the same for all candidates will contain 8.60cm3 of the concentrated hydrochloric acid per dm3 solution.

(b) 150cm3 of sodium trioxocarbonate (iv) solution in a bottle labelled Bn . The solution which should be the same for all candidates will contain 3.20g of sodium trioxocarbonate (iv) per dm3 of solution.

(c) One spatulaful of potassium trioxocarbonate (iv) salt in a specimen bottle labelled Cn.

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