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2020 WAEC CHEMISTRY PRACTICAL SPECIMEN

Published by on August 21st, 2020.


1. Great care should be taken to ensure. The information given in items 2 and 3 below does not reach the candidate 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 50cm3 capacity
(b) one pipette, either 20cm3 or 25cm3. All the candidates at one center Must use pipette of the same value. 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) 10% dilute sodium hydroxide solution
(ii) dilute hydrochloric acid
(iii) dilute trioxonitrate(v)acid
(iv) Silver trioxonitrate (v) solution
(v) acidified potassium dichoromate solution
(vi) acqueous ammonia
(vii) lime water
(viii) red and blue litmus papers
(ix) dilute tetraoxosulphate (vi) acid

(e) Spatula

(f) Filtration apparatus
(g) one beaker
(h) one boiling tube
(i) four test tubes
(j) methyl orange as indicator
(k) mathematical table/calculator
(l) wash bottle containing distilled/deionized water
(m) burning splint
(n) watch glass
(o) Bunsen burner/ source of heat
(p) droppers
3. Each candidate should be supplied with the following, where n is the candidate’s series number.
(a) 150cm3 of a solution of HNO3 in a corked flask or bottle labelled ‘An’.
These should all be the same containing 10.0cm3 of concentrated HNO3(about 70%) per dm3 of solution.
(b). 150cm3 of NaOH solution in a corked flask or bottle labelled ‘Bn’. These should all be the Same containing 4.0g of NaOH per dm3 of solution
(c) About 15.0cm3 of an organic compound propane 2 ol in a corked specimen tube or test tube Labelled ‘Cn’. This must be the same for all candidates
(d) One spatulaful of crystals of iodine in a specimen bottle labelled ‘Dn’ This must be the same for all candidates

4. In all cases, more material may be issued if required

5. The actual concentrations of A and B must be stated on the supervisors report form. The candidates will assume that the concentrations are exactly as stated in the question paper

6. it should be noted that the school are not allowed to amend information provided on you question paper or substitutes any substance for those specified in these instructions

TRENDING SONGS


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