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Question

(a) What is aqua regia?
(b) State the uses of aqua-regia.
(c) What is the function of HCI in the preparation of aqua-regia? [5 MARKS]

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Solution

a) 1 Mark
b) 2 Marks
c) 2 Marks

(a) Aqua-regia is a mixture of 3 parts of cone. HCI and one part of cone. HNO3.
(b) Uses of aqua-regia :
It is used for refining of the noble metals like gold and platinum.
(c) In the preparation of aqua-regia, conc. HCI on oxidation with conc. HNO3 produces nascent chlorine which reacts with the noble metals.

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