







Aqua Regia Definition and Preparation. Aqua regia is a highly corrosive mixture of hydrochloric acid (HCl) and nitric acid (HNO 3) in a molar ratio of 3:1 or 4:1. The name "aqua regia" translates from Latin to mean "king's water" or "royal water," referring to the acid's ability to dissolve the noble metals gold, platinum, and ...







Overview. Aqua regia (Latin for "Royal Water") is a solution of nitrohydrochloric acid. The traditional solution is comprised of a 3:1 mixture of hydrochloric acid and nitric acid, respectively. It is commonly used to remove noble metals such as gold, platinum and palladium from substrates, particularly in microfabrications and microelectronics ...

































Aqua regia is a mixture of nitric and hydrochloric acid concentrations, usually one portion of the former by volume to three portions of the latter. The alchemists gave this mixture its name (literally, "royal water") due to its ability to dissolve gold and other so-called noble metals. Aqua regia is a fuming liquid which is yellow, orange and ...



The mechanism of aqua regia happens upon mixing the concentrated hydrochloric acid and the nitric acid. The result is in volatile products, nitrosyl chloride and chlorine gas: HNO 3 + 3HCl --> NOCl + Cl 2 + 2H 2 O This is shown by the fuming nature of aqua regia. As the volatile products are removed via the exhaust, the nitrosyl chloride …
