NECO 2019
8:30 AM
NECO 2019 VARIFIED CHEMISTRY PRACTICAL SPACIMENS
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) Barium chloride solution
(v) Distilled water
(vi) Red and Blue litmus paper
(vii) Phenolphtalein
(d) Methyl orange
(e) One boiling tube
(f) Five test tubes
(g) Filtration apparatus
(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 3.4cm³ of the concentrated hydrochloric acid per dm³ solution.
(b) 150cm³ of sodium hydroxide solution in a bottle labelled “Bn”. The solution which should be the same for all candidates will contain 4.0g of sodium hydroxide per dm³ of solution.
(c) One spatulaful of copper (ii) tetraoxosulphate (vi) salt in a specimen bottle labelled “Cn”.
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