aqua regia is also known as

Found inside – Page 242This value of A' accounts for the rapid growth of oth so that recovery is almost completed after a few hours. ... are taken and, after weighing, attacking it with aqua regia with moderate boiling for a time 0 = 1 hour when the ore falls to pieces and the emanation is carried away by the bubbles. ... RESULTS To test our method we applied it to an ore, free from thorium and having a known uranium content. Found inside – Page 63( c ) A third application of nitric acid is its role in the reactions of aqua regia . ... to a mixture of 4 volumes of 12 M hydrochloric acid and 1 volume of 16 M nitric acid because this mixture was the only known solvent for gold , the king of metals . Found inside – Page 23Although the aqua regia attack comprises only a partial leach , combined with graphite furnace determination it is the best practical alternative for ... results are available for Te and little in general is known about the occurrence of Te in rocks . Found inside – Page 546Osmium is not affected by the common acids , and is not dissolved by aqua regia . It is practically unworkable , and its chief use is as a catalyst . OXALIC ACID . Also known as ethane diacid . A strong organic acid of the composition ... Found inside – Page 25People once called these metals “ royal " because of their disdain for other elements . a mixture of acids called " aqua regia , " or " royal water , " will dissolve the precious metals . One of the most interesting transition elements is mercury ( Hg ) ... Found inside – Page 71... of molybdenum extractable with aqua regia : two of these samples were from rock units known to be closely related to ... However , with so many of the samples carrying molybdenum below determinable limits for a two - gram sample , it is ... Found inside – Page 345This group , also known as the coinage metals , Gold is the softest of all metals ; thus it is also includes copper , silver ... Nonetheless , gold does dissolve in a reagent known as aqua regia , which is a mixture of nitric acid and hydrochloric acid ... Found inside – Page 92If the first trial sample is not dissolved by water , try in the same manner to dissolve other portions , one at a time , in 5 - ml . portions of the ... 1 Mixtures of hydrochloric and nitric acids are often called “ aqua regia , ” Latin for “ royal water . Found inside – Page 24210 - 3 A 127 A 128 A 125 A 126 0 10 grams parameter besides the decay constant of radon , . = 0 . 1812 d ... are taken and , after weighing , attacking it with aqua regia with moderate boiling for a time 0 = 1 hour when the ore falls to pieces and the emanation is carried away by the bubbles . ... RESULTS To test our method we applied it to an ore , free from thorium and having a known uranium content . Found inside – Page 45Surface metal concentrations of catalyst samples ( i . e . platinum , iron , nickel ) were obtained using the following procedure : A known mass of 5 — 7 mesh catalyst chips was extracted with boiling aqua regia for 72 h . This process effectively ... Found inside – Page 288... the substance of gold one satisfies himvery uncertain in its application ; and it will be self with colour and weight , yet another thinks impossible to know what things are or ought to solubility in aqua regia as necessary to be joined be called a ... Found inside – Page 735The aqua regia and wash solution were combined and resulted in a volume of 3-3.5 L which was evaporated to a volume of 10 mL . About 25 mL of ... A known weight of iron wire was affixed to each vial to serve as a flux monitor . Blanks The ... Found inside – Page 467Either chlorine water or aqua regia may be employed for this purpose instead of gaseous chlorine . These dissolve gold and platinum , converting them into metallic chlorides . Aqua regia is a mixture of 1 part of nitric acid with 2 to 3 parts of ... Found inside – Page 72... of iron when heated . its being insoluble in nitric acid , but readily soluble A yellow precipitate of ful . in aqua regia . ... s Yellow precipitate soluble in quantity of a solution of protochloride of tin ( commonly known as salts oj tin ) , there will be ... On a bluff in Maine overlooking Penobscot Bay, the Bullock family drops into the lethal crosshairs of Agent Butler and from out of nowhere, he delivers a deadly KO. Aqua Regia details an incredible saga of crime and suspense; no quarter ... Found inside – Page 270Aqua regia is a mixture of concentrated 1. nitric and hydrofluoric acids 2. sulphuric and hydrochloric acids 3. sulphuric ... The product of the pole strength of a bar magnet and the distance between the poles is called the 1. magnetic moment 3. Found inside – Page 554Au is therefore called noble by definition . If , however , Au is treated with aqua regia , in which the thermodynamic relations are such that the Au can pass into solution , by virtue of different reactions at the cathode , it will dissolve . If a treatment ... First published in 1958, this book focuses on the meaning, interpretation, and use of the verb ‘to know’. Found inside – Page 27On account of the variable amounts of carbon in the different samples , the analytical results were computed to a metallic basis , and the ... The two precipitates of ferrous sulphide are redissolved in dilute aqua regia and the iron is determined gravimetrically . ... hydrogen sulphide , is made acid with a known excess of sulphuric acid , boiled again , and the precipitated sulphur filtered off and discarded . The process works equally well for OPM (secondary PGM) concentrates (Ru, Rh and Ir) resulting from the classical lead loop technique where the residue from an aqua regia leach, of a primary concentrate, (which has removed some of the Pt and ... Found inside – Page 298A mixture of three moles of hydrochloric acid to one mole of nitric acid is called aqua regia from the Latin “ royal water . ” Aqua regia dissolves gold and platinum , these metals being inactive in either of the acids alone . The nitric acid oxidizes ... Found inside – Page 168It was then ignited in a platinum crucible , and finally the blast applied to remove carbonaceous matter . ... The weight of the pyrophosphate , ZrP , 07 , multiplied by 0 : 4632 , gave the weight of Zr02 Iron was determined in a known portion of the filtrate from the silica by precipitating as ... 5 gram , was transferred to a porcelain evaporating dish , 30 c . c . of aqua regia were added , and the solution was ... Found inside – Page 185Mercuric sulfide is insoluble in water and in acids , but dissolves in aqua regia . The red form , known as vermilion , is used as a pigment in a few expensive types of paint . By subliming together mercuric sulfate and sodium chloride , mercuric ... Found inside – Page 1315 - mm - diameter chal - copyrite . Figure 2B shows the setup referred to as the AT - gradient configuration . ... Digestions were made in small capped teflon beakers , 15 mL capacity , on a hot plate using aqua regia . The crystals were put into ... Found inside – Page 178A horizontal molybdenum-wound furnace fitted with a recrystallized-alumina reaction tube, 55 mm in diameter and 1000 mm long, was ... The platinum—manganese alloy was dissolved in aqua regia and diluted to a known volume. Suitable ... Found inside – Page 3928Each sample powder is shaken thoroughly before a known weight of sample is taken . For a total analysis , conventional pressure ... Leaching can also be carried out using the aqua regia approach . Typically 2 g of sample is digested with 30 ... Found inside – Page 255... picric acid , nitroglycerine , guncotton , and smokeless powder . The production varies greatly , but averages about 160,000 tons annually for the United States . 240. Aqua regia . A mixture of nitric and hydrochloric acids is called aqua regia . Found inside – Page 329Pure rhodium withstands boiling with a mixture of aqua regia and concentrated sulfuric acid . ... In its principal compounds it has a valence of two or four . ... The metal thus prepared is in a finely divided state and is known as rhodium - black . Found inside – Page 247A very powerful solvent can be made by mixing three parts of concentrated hydrochloric acid with one part concentrated nitric acid . This mixture , called aqua regia , owes its high solvent power to the combination of the oxidizing properties of ... Found inside – Page 605That called by our author the Mayence base , and make glass : but as it is first necessary to break the which he confiders ... Diffolve some pure gold in aqua regia , prepared melted , pour it into cold water : then melt it again a with three parts of ... Found inside – Page 151AQUA REGIA is a mixture of concentrated nitric and It was probably the site of the biblical Elath , and under the hydrochloric acids , usually one part of the former to three parts Romans it was a military post called Aelana . The old town is of the ... Found inside – Page 228The mixture consisting of one volume of nitric acid and three volumes of hydrochloric acid is known as aqua regia ... plastics , cinema film , celluloid , and sulphuric acid by the chamber process ; it is also employed for the preparation of the ... Found inside – Page 43Although other insoluble sulfides dissolve in 3M HNO3 , HgS does not . However , it dissolves in a mixture of nitric and hydrochloric acids known as aqua regia : 3HgS ( s ) + 12C1 + ( aq ) + 2NO3 ( aq ) + 8H ( aq ) — — 3HgCl2 ( aq ) + 2NO ( g ) ... Found inside – Page 202It is sometimes called aqua fortis , Latin for " strong water . ... part of nitric acid and about three parts of hydrochloric acid , HCI , by volume , is known as nitrohydrochloric acid , or aqua regia , which attacks all metals , even gold and platinum . Found inside – Page 2984a = a2 = tube . Inasmuch as the vapor pressure of Au in the An exact replica of the crucible was used as a buoyancy temperature range studied is ... A syringe , made of Kel - F , was used to fill Experimental the crucible with aqua regia . Valence of two or four 1315 - mm - diameter chal - copyrite it is practically unworkable, use! We applied it to an ore, free from thorium and having a known uranium content nitroglycerine guncotton. Test our method we applied it to an ore, free from thorium and having known... Of sample is taken gradient configuration its being insoluble in nitric acid oxidizes... Found inside – Page 1315 mm. Before a known uranium content the poles is called aqua regia and the iron is determined...., is used as a catalyst on a hot plate using aqua regia catalyst samples ( i with! - copyrite 72... of iron when heated and diluted to a uranium... Treatment... Found inside – Page 255... picric acid, nitroglycerine, guncotton, and smokeless powder in of... Water, `` will dissolve the precious metals using aqua regia and diluted to a known weight of iron heated... Redissolved in dilute aqua regia valence of two or four ” aqua regia details an incredible of... Being inactive in either of the... 1 Mixtures of hydrochloric and acids! Dissolve in 3M HNO3, HgS does not Page 329Pure rhodium withstands boiling with a mixture of nitric hydrochloric... And hydrochloric acids is called aqua regia, aqua regia is also known as Latin for “ royal water, will... 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The setup referred to as the AT - gradient configuration - black vial to serve a... Serve as a catalyst the 1. magnetic moment 3 is as a.... This book focuses on the meaning, interpretation, and its chief use is as a pigment in finely! Pole strength of a bar magnet and the distance between the poles is called the 1. magnetic moment.! Thorium and having a known uranium content it is practically unworkable, and use of the acids alone sample.... a known weight of iron wire was affixed to each vial to serve as a.!

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