Aqua regia and other mixtures similar to it are used in analytical procedures for the solution of certain iron ores, phosphate rocks, slags, nickel-chromium alloys, antimony, selenium, and some of the less soluble sulfides, such as those of mercury, arsenic, cobalt, and lead. Aqua regia. Article Media. Info Print Cite. Lista de Canciones: Necrofantasia [Soul Sublimate Remix] , Voyage [Lunar Eclipse Remix] , Gensokyo Millennium [Astronaut Adventure Remix] , Touhou Shoukasou Descarga: MG.
Ultimate Truth [Liberated Desire Remix] , Retrospective Kyoto [Past of Revival Remix] , Atomic Universe [ Mix] , Final Sunset , Last Moment , Imdcy , White Out [ Mix] , Angel Dust [ Mix] , Tokyo Snow Night Code White CD Vol. Excitement , Transient , Heretics Dominations Descarga: MG.
YJast Falling For You , Walking This Road , No Wings , Exile , Sketching You! Pandemic , Elope Omnifarious Descarga: MG. Dj Nanashi — Breath of Sea , Minamotoya — For a Good Sleeping , Junk — Aihana , Dj Nanashi — Numberless , Thanatos — Oriental Evolution , Dj Noriken — Nocturne , USAO — Dandelion , Omnifarious2 Descarga: MG. Camellia — Where is the God , Aran — Green Orb , Alinut — Falconet , Dj Noriken — Sleepless , Cittan — Akier , Junk — Setsuna , Minamotoya — Miyabi , Dj Nanashi — Air Garden Theta Complex Descarga: MG.
Ziki 7 — Heat Ocean , Shaman Cure-All — Debu , Shaman Cure-All — Aneurysm , Ziki 7 — Libradigger , Oiko — Water of Imagination , Theta Complex 2 Descarga: MG. Suge — Zen Tuned , Clean Tears — Screw Force , If elemental gold is desired, it may be selectively reduced with sulfur dioxide , hydrazine , oxalic acid , etc.
Similar equations can be written for platinum. As with gold, the oxidation reaction can be written with either nitric oxide or nitrogen dioxide as the nitrogen oxide product:. Experimental evidence reveals that the reaction of platinum with aqua regia is considerably more complex. The nitrosoplatinic chloride is a solid product. If full dissolution of the platinum is desired, repeated extractions of the residual solids with concentrated hydrochloric acid must be performed:.
The chloroplatinous acid can be oxidized to chloroplatinic acid by saturating the solution with chlorine while heating:. Dissolving platinum solids in aqua regia was the mode of discovery for the most dense metals, iridium and osmium , both of which are found in platinum ore and will not be dissolved by the acid, instead collecting on the base of the vessel.
As a practical matter, when platinum group metals are purified through dissolution in aqua regia, gold commonly associated with PGMs is precipitated by treatment with iron II chloride.
Platinum in the filtrate, as hexachloroplatinate IV , is converted to ammonium hexachloroplatinate by the addition of ammonium chloride. This ammonium salt is extremely insoluble, and it can be filtered off. Ignition strong heating converts it to platinum metal: . Unprecipitated hexachloroplatinate IV is reduced with elemental zinc , and a similar method is suitable for small scale recovery of platinum from laboratory residues.
Aqua regia reacts with tin to form tin IV chloride , containing tin in its highest oxidation state:. It can react with iron pyrite to form nitric oxide :. Aqua regia was first mentioned in the works of Islamic alchemists such as Muhammad ibn Zakariya al-Razi ,  and then later mentioned in a work of Pseudo-Geber ca. Seek medical attention in the event of respiratory irritation, cough, or tightness in the chest. Symptoms may be delayed. Do not store aqua regia. Aqua regia quickly loses it effectiveness due to oxidation of its reactive components.
Mix a fresh solution for each use. Excess solutions should be neutralized with sodium bicarbonate and disposed via the drain, followed by flushing with copious amounts of water. After the material has cooled, the spent solution should be neutralized with sodium bicarbonate and disposed via the drain, followed by flushing with copious amounts of water. If the solution is contaminated with heavy metals i.Featured on the special edition of Aqua's Greatest Hits CD and contains a live concert recording from Tivoli Gardens in Copenhagen. One of the songs presented there is the previously unreleased song "Shakin' Stevens", the demo version of their song "Sucker for a Superstar" from their album Megalomania.