WAEC CHEMISTRY 2022 PRACTICAL SPECIMEN

(1)
INSTRUCTIONS

(2)
In addition to the fittings and reagents normally found in a chemistry laboratory, the following apparatus and materials will be required by each candidate.

(a) One Burette of 50cm3 of capacity
(b) One pipette, either 20cm3 or 25cm3 (All candidates at one center must use pipettes of the same volume, 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 labeled:
(i) 10% dilute sodium hydroxide solution
(ii) dilute hydrochloric acid
(iii) dilute trioxonitrate(v) acid
(iv) silver trioxonitrate(v) acid
(v) acidified potassium dichromate solution
(vi) aqueous ammonia
(vii) lime water
(viii) red and blue litmus paper
(ix) dilute tetraoxosulphate(vi)
(x) aqueous barium chloride

(e) Spatula
(f) Filtration apparatus,
(g) One beaker
(h) One boiling tube
(i) Four test tubes
(j) Starch solution indicator
(k) Glass rod
(l) Wash bottle containing distilled/deionized water,
(m) Burning splint,
(n) Watch glass
(o) Bunsen Burner/source of heat
(p) Droppers

(3)
(a) 150cm3 of iodine solution in a corked flask or bottle labeled ‘An’. These should all be the same containing 25.4g of I2 in 6.0g kl per dm3 of solution.
(b) 150cm3 of sodium thiosulphate pentahydrate solution in a corked flask or bottle labeled ‘Bn’. These should all be the same containing 24.82g of Na2S2O3 per dm3 of solution.
(c) One spatulaful of ammonium ferrous sulphate, (NH4)2Fe(SO4)2.6H2O in a specimen bottle labeled ‘Cn’.
This must be the same for all candidates.
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*BIOLOGY PRACTICAL SPECIMEN*

*GROUP I*

Specimen A – Weevil-damaged bean seed
Specimen B – Viable bean seed
Specimen C – Dried maize grain soaked in water overnight
Specimen D – Soldier termite (dead)
Specimen E – Honeybee (dead)
Specimen F – Muddy water (in a test tube)
Specimen G – Lower jaw of a herbivore with teeth intact

*GROUP II*

Specimen H – Head of domestic fowl (complete)
Specimen J – Quill feather
Specimen K – Leg of domestic fowl (complete) Specimen L – Head of duck complete)
Specimen M – Leg of duck (complete)

NOTE: All specimens can be provided as group specimens for five (5) to ten (10) candidates

All specimens in each group must carry individual labels

(eg A, B, C, D, E, F and G in Group I). It is essential that each candidate should be provided with the following materials:

(i) glass jar cover Petri dish;
(ii) white tiles.
(iii) beaker
(iv) a hand lens/magnifying lens
(v) scalpel/razor blade/knife,
(vi) a pair of forceps
(vii) lodine solution.