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_Neco Chemistry Practical – June/July 2019 Specimens

Neco Chemistry Practical – June/July 2019 Specimens

Requirements:
(a) One burette (50cm³)
(b) One pippete (20cm³/25cm³).
However, all candidates in a
center must use pipettes of the same volume.
© 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.
© One spatulaful of potassium trioxocarbonate (iv) salt in a
specimen bottle labelled “Cn”

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