Aqua Reʹgia [royal water]
.So called because it dissolves gold, the king of metals. It consists of one part of nitric acid, with from two to four of hydrochloric acid.
So called because it dissolves gold, the king of metals. It consists of one part of nitric acid, with from two to four of hydrochloric acid.
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Entry taken from Dictionary of Phrase and Fable, edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.