单词	aqua regia
释义	aqua regia /ˌakwə ˈriːdʒə / noun [mass noun] Chemistry A mixture of concentrated nitric and hydrochloric acids. It is a highly corrosive liquid able to attack gold and other resistant substances.It is not attacked by most acids, although it does dissolve in aqua regia (a mixture of concentrated nitric acid and 3-4 parts of hydrochloric acid).... Some time before 1300, sulfuric acid was prepared, and alchemists created aqua regia, a mixture of sulfuric and nitric acids that is capable of dissolving gold, platinum, and many other materials. Gold resists corrosion by air and most chemicals but can be dissolved in a mixture of nitric and hydrochloric acids, a solution called aqua regia because it dissolves the ‘king of metals’. Origin Early 17th century: Latin, literally 'royal water'.
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