Aqua Regia

A mixture of nitric and hydrochloric acids, usually 1:3 or 1:4 parts HNO3 to HCl, used to dissolve gold. Also known as "Royal Water".

It is a highly corrosive liquid that will attack many substances unaffected by others.

See also: Gold, Hydrochloric Acid, Nitric Acid.

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Subjects: Chemistry