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Aqua regia (/ ˈreɪɡiə, ˈriːdʒiə /; from Latin, "regal water" or "royal water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. [b] Aqua regia is a fuming liquid. Freshly prepared aqua regia is colorless, but it turns yellow, orange or red within seconds from the formation of nitrosyl chloride and ...
Alchemical symbols were used to denote chemical elements and compounds, as well as alchemical apparatus and processes, until the 18th century. Although notation was partly standardized, style and symbol varied between alchemists. Lüdy-Tenger [ 1 ] published an inventory of 3,695 symbols and variants, and that was not exhaustive, omitting for ...
Hydrochloric acid, also known as muriatic acid or spirits of salt, is an aqueous solution of hydrogen chloride (HCl). It is a colorless solution with a distinctive pungent smell. It is classified as a strong acid. It is a component of the gastric acid in the digestive systems of most animal species, including humans.
Acid test. An acid test is a qualitative chemical or metallurgical assay utilizing acid. Historically, it often involved the use of a robust acid to distinguish gold from base metals. Figuratively, the term represents any definitive test for attributes, such as gauging a person's character or evaluating a product's performance.
Rouge/ crocus / colcothar – ferric oxide, formed by burning green vitriol in air. Stibnite – antimony or antimony trisulfide, ore of antimony. Turpeth mineral – hydrolysed form of mercury (II) sulfate. Verdigris – Carbonate of Copper or (more recently) copper (II) acetate. The carbonate is formed by weathering copper.
Platinum being dissolved in hot aqua regia. Platinum has excellent resistance to corrosion. Bulk platinum does not oxidize in air at any temperature, but it forms a thin surface film of PtO 2 that can be easily removed by heating to about 400 °C. [17] [18] The most common oxidation states of platinum are +2 and +4. The +1 and +3 oxidation ...
aqua (aq.) water: aqua fortis: strong water: Refers to nitric acid, thus called because of its ability to dissolve all materials except gold and platinum aqua pura: pure water: Or, "clear water" or "clean water" aqua regia: royal water: Refers to a mixture of hydrochloric acid and nitric acid, thus called because of its ability to dissolve gold ...
Chloroauric acid is an inorganic compound with the chemical formula H [AuCl4]. It forms hydrates H [AuCl4]·nH2O. Both the trihydrate and tetrahydrate are known. Both are orange-yellow solids consisting of the planar [AuCl4]− anion.