Question
What is an aqua regia? Which metals can be dissolved in it?
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Answer
A freshly prepared mixture of concentrated hydrochloric acid and concentrated nitric acid in the ratio of 3 : 1 is called an aqua regia (Latin meaining 'royal water'). Aqua regia is a highly corrosive, fuming liquid. Many metals along with noble metals like gold and platinum can be dissolved in aqua regia solution.
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