AQUAREGIA

Aqua regia

Aqua regia, aqua regis, or nitro-hydrochloric acid is a highly corrosive mixture of acids, a fuming yellow or red solution. The mixture is formed by freshly mixing concentrated nitric acid and hydrochloric acid, optimally in a volume ratio of 1:3. It was named so because it can dissolve the so-called royal or noble metals, gold and platinum. However, titanium, iridium, ruthenium, tantalum, osmium, rhodium and a few other metals are capable of withstanding its corrosive properties.

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aqua regia

Noun

(abbreviation A.R.)
  1. A mixture of three parts concentrated hydrochloric acid to one part concentrated nitric acid.


The above text is a snippet from Wiktionary: aqua regia
and as such is available under the Creative Commons Attribution/Share-Alike License.

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