what is aqua regia and what does it do?
Aqua regia is a mixture of hydrochloric acid and nitric acid.
It is used in refining gold cleaning glassware etc.
Gold does not react easily with acid but it reacts with aqua regia. What is aqua regia ? Why does it react with gold?
(i) What is aqua-regia? (ii) State the use of aqua-regia. (iii) What is the function of HCl in preparation of aqua-regia?