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WAEC 2018 Chemistry Practical Question & Answer May/June Expo

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Waec 2018 May/June Questions and Answers
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WAEC 2018 Chemistry Practical Question & Answer May/June Expo
CHEMISTRY SPECIMEN:

+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 candidates at one centre 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 labelled.

(i) Red and blue litmus paper,
(ii) aqueous ammonia,
(iii) dilute hydrochloric acid,
(iv) dilute sodium hydroxide solution,
(v) barium chloride solution,
(vi) dilute trioxonitrate(v) acid,
(vii) silver trioxonitrate(v)solution,
(viii) Lime water

(e) glass rod;
(f) filtration apparatus,
(g) spatula,
(h) two boiling tubes,
(i) four test tubes,
(j) wash bottle containing distilled/deionized water,
(k) mathematical table/calculator.

+Each candidate should be supplied with the following, where ‘n’ is the candidate’s serial number.

(a) 150cm³ of potassium tetraoxomanganate
(VII)solution in a corked flask or bottled labelled ‘A’n. These should all be the same containing 7.7g of KMnO4 per dm³ of solution.

(b) 150cm³ of iron
(II)chloride solution in a corked flask or bottle labelled ‘Nn’. These should all be the same containing 19.1g of FeCl2 per dm³ of solution.

NB- FeCl2 solution should be freshly prepared.
– Each candidate should be provided with 150cm³ 2M H2SO4.

(c) One spatulaful of copper(II)chloride in a specimen bottle labelled ‘Cn’ and one spatulaful of ammonia carbonate in a specimen bottle labelled ‘Dn’.

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