2014 WAEC Chemistry Practical Consider the following experimental set-up.   (i) Identify by name: P; Q; R; S and...

Consider the following experimental set-up.

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(i) Identify by name: P; Q; R; S and T.

(ii) State the method of collection of gas, S.

(iii) What is the function of R in the experimental set-up?

(iv) Write the balanced equation of the reaction for the preparation of gas S.

(i) P - Delivery tube

Q - Drying tower

R - Calcium oxide

S - Ammonia gas

T - Retort stand with clamp

(ii) Upward delivery of gas/downward displacement of air

(iii) To dry the gas

(iv) Ca(OH)\(_{2(aq)}\) + 2NH\(_4\)Cl\(_{(aq)}\) \(\to\) CaCl\(_{2(aq)}\) + 2H\(_2\)O\(_{(l)}\) + 2NH\(_{3(g)}\)

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