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Sometimes placer gold just out of a streambed is very clean and shiny If this is the case with your gold after the final dry cleanup procedure is completed your gold is ready to be weighed and sold or displayed or stored away in a safe place Sometimes gold will come out of a streambed with some impurities attached to itJul 19 32 If gold is mixed evenly in the alloy and at a low enough concentration you can use plain nitric acid to dissolve away impuriti However if the gold is more pure or is an external plating what actually happens is that the nitric acid tries to dissolve everything but the gold
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The concentrated sulfuric acid must be added to the water with stirring The concentrated sulfuric acid rapidly reacts with water producing a good deal of heat energy as it donates a proton H to the water The reaction can be violent so small amounts of the concentrated acid are added slowly with stirring to dissipate the heatWhat is the highest concentration solution in M that you are aware of organic inorganic or aqueous such as sulphuric ac If you dissolved a large amount of which in one molecule of
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The initial step is to weight the Dore metal Since silver is leached by nitric acid and gold no the next step is to attack the Dore metal with a hot diluted solution of nitric ac The acid dissolves the silver and leaves the gold that has to be rinsed dry and weight on a scale of high sensibility such as mg2 You can put everything into an acid that dissolves other substances and doesn t dissolve gold Or 3 You can put everything into a solvent that dissolves gold without dissolving the other substances and throw away what isn t dissolved But this one my be tough or impossible since gold is hard to dissolve and many other materials dissolve
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Dec 16 32 Recently I ve been trying out some electrolysis just to observe the results and catch the occasional bit of hydrogen and I m hoping to start learning much more about chemistry in general as at the moment I don t really know much about thisWhen I decided to first do the experiment the only power source I had access to that didn t provide a deadly current that is was an old 30v 333mA Mar 07 32 In phones most of the gold is in the SIM card the main board and the smaller components on the back of the LCD screen Use a magnet to separate all gold
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The respective concentration levels within leach liquor were ppm for gold 50 ppm for palladium and containing very high levels of other impuriti The acid concentration of the filtrate was adjusted to 1 M or less and lead and silver was precipitated and separated from leach liquorSep 24 32 Just what happens if everything is hot and in high concentration Typical silver chloride precipitate looks very strange But everything is OK It is 40 or 50g of silver in solution can t
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How to Extract Gold From Electronics In this Instructable I will show you how to extract gold from computers using products most people have lying around in their hom The way I extract the gold is relatively straight forward and pretty easy but the chemicals used are very danger Parting in metallurgy the separation of gold and silver by chemical or electrochemical means Gold and silver are often extracted together from the same ores or recovered as by products from the extraction of other metals A solid mixture of the two known as bullion or doré can be parted by boiling in nitric ac
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$\begingroup$ Yes you are freezing out acetic acid which has a melting point of 17C and your freezer is probably on the order of 10C Your plan to filter it should give you very concentrated acetic acid which could be a safety hazard I would read this and this before planning how to proceed You will probably want to dilute the acetic acid by about 3 parts water to one part AACommercially available nitric acid is an azeotrope with water at a concentration of 68 HNO 3 which is the ordinary concentrated nitric acid of commerceThis solution has a boiling temperature of 176 C at 1 atm Two solid hydrates are known the monohydrate HNO 3 H 2 O or H 3 O NO 3 and the trihydrate HNO 3 3H 2 O
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Feb 05 32 After inspection of the cards reveals that there is no gold on any card remove the cards Squirt them off with distilled water to wash gold as much gold as possible down into the acid bucket Now filter the acid in the five gallon bucket to separate the gold flakes from the copper chloride acid Aqua regia is primarily used to produce chloroauric acid the electrolyte in the Wohlwill process for refining the highest quality gold Aqua regia is also used in etching and in specific analytic procedur It is also used in some laboratories to clean glassware of
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A Method for Leaching or Dissolving Gold from Ores or Precious concentrated hydrochloric acid HCl with one part of concentrated nitric acid HNO 3 Moreover it usually contains the gold concentration was also measured once by atomic absorption spectrometryMar 07 32 In phones most of the gold is in the SIM card the main board and the smaller components on the back of the LCD screen Use a magnet to separate all gold
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The first step is to determine whether the metal in question has platinum content is a variety of white gold or an acid resistant non precious alloy Any of these would be indicated by resistance to the Au 585 testing acid concentrated nitric acid Streak Test The metal streak on the touchstone is first dabbed with Au 750 acWe want pure gold but gold bearing rocks include lots of other materials such as quartz calcite and the sulfides of other metals We need to separate the gold from everything else in the rock so the rock needs to be treated in some way In New Zealand we chiselled some rocks from an
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Sometimes placer gold just out of a streambed is very clean and shiny If this is the case with your gold after the final dry cleanup procedure is completed your gold is ready to be weighed and sold or displayed or stored away in a safe place Sometimes gold will come out of a streambed with some impurities attached to itthe materials must be sorted and treated in separate acid baths place the material in a clear glass or plastic container hdpe plastic add the nitric substitute acid just enough to cover the materials without heating the bath it will take 3 to 10 days for the acid to desolve all the non gold metals
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Apr 24 32 Pour the acid and bleach mixture into the plastic bowl with the ore grains and stir Allow four hours for the gold to dissolve stirring every 20 minut The chlorine reacts with the gold inside the ore to form gold chloride Filter the ore and bleach solution to The incidence of fine gold s quantity also appears to be related to the gold concentration as well If the assay is 2 ounces per ton there are generally larger gold particles present along with the typically fine micron sized gold When the grade diminishes to say 02 ounces per ton there are generally only micron sized particles associated
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