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# Form 3 Chemistry Chlorine and Its Compounds Questions and Answers

(a) In an experiment hydrogen chloride gas was prepared and reacted with aluminium turnings to form a solid Q and gas R as shown below.

(i) Name:
Liquid P
Solid Q
Gas R
(ii) Name another substance that could serve the same purpose as the concentrated sulphuric (VI) acid.
(iii) Explain the following observation. When a blue litmus paper was dipped into the water in the beaker at the end of the experiment it turned red.
(iv) Explain why solid Q collects further away from the heated aluminium.
(b) (i) Write an equation for the reaction that takes place between ammonia gas and hydrogen chloride gas.
(ii) Calculate the mass of the product that would be formed when 200cm^3 of hydrogen chloride gas reacts completely with excess
ammonia gas. (H=1.0, N=14.0, Cl=35.5, one mole of gas occupies 24 litres at room temperatures and pressure.)

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