The nitric acid eats up the silver and leaves the gold on the bottom of the bowl, after that my father dumps the liquid in a plastic bowl and washes the gold and then melts which makes it into a 99.99% purity (24 Karat). Now to separate the silver from nitric acid, for this step you have to leave a copper wire in the bowl for 5 to 6 hours that makes leaves the powder on the bottom of the bowl ...
REFINING-RECOVERY AND REFINING WITH JUST NITRIC ACID . recovery and refining with just nitric acid substitute then fill the container 3/4 full with sulfuric acid battery acid/ electrolite available from auto-parts stores without heating the bath it will take 3 to 10 days for the acid to desolve all the non-gold …
Dilution of the gold content is necessary to ensure that the nitric acid can readily attack and dissolve the base metals and silver, some of which may be otherwise masked by the gold. Any palladium which is alloyed in the gold will also be removed by the acid.
This is a free tutorial on gold recovery method using nitric acid to extract pure gold from old gold and scraps of gold by process of dissolving unwanted metals. When I use this refining method, I regard the purity of the gold as 22kt, and I alloy it accordingly down to 18kt or 14kt.
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Sulfuric acid (also spelled sulphuric acid or in old texts as oil of vitriol) is one of the strong mineral acids and has a number of practical uses in refining. The acid differs from hydrocloric acid and nitric acid in that it contains two hydrogen atoms that can be ionized in water.
Make Nitric Acid - The Complete Guide - YouTube. Jun 03, 2009 · This can be done by reacting hydrochloric acid, a nitrate salt and copper. Around 80grams of sodium nitrate, over 30 grams of copper and 100mL of hydrochloric acid (37% 12M) are the quantities needed.
· Best Answer: Mixing sulfuric acid and sodium nitrate will produce a solution containing sodium, nitrate, hydrogen, and hydrogen sulfate ions. Nitric acid solution contains hydrogen and nitrate ions, so nitric acid can be thought of as a component of this solution, but it will not be as strong as pure nitric ...
Parting Gold-Silver Alloy with Sulphuric Acid Alloys of 10 grains of gold, assaying 9992, were taken, and alloyed with 10, 15, 20 grains of fine silver respectively. Each alloy was rolled out in the same manner as was adoped for the nitric acid parting; 20cc of strong sulphuric, 92 per cent., acid was used in each case, and the cornets were boiled for one hour.
In the case of muriatic acid, this leaves a chloride ion, Cl-; in the case of nitric acid a nitrate ion remains and has the formula NO3-. The name of the product that can dissolve gold is aqua regia, which is Latin for "royal water." It is a mixture of 3 parts HCl to 1 part HNO3 or thereabouts.