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What is aqua regia? How it is helpful in dissolving noble metals? (Standard 10 questionChemistry .) please try answering the second part of answer. |
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Answer» ong>Answer: Aqua regia is a mixture of nitric ACID and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange FUMING liquid, so named by alchemists because it can dissolve the noble metals gold and platinum, though not all metals. Currently, aqua regia, a mixture of concentrated nitric acid and hydrochloric acid, usually in a molar ratio of 1:3, is USED to dissolve noble metals. This ALLOWS these relatively rare elements to be RETRIEVED from worn-out and scrapped catalytic converters and other equipment. |
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