Nitric acid dissolves gold alloys used in jewellery, leaving endure purified gold.
Gold jewellery is fabricated from gold alloys, which posses differing amounts of gold in them depending on the carat assessing. Recycling gold becomes commodious affair when the expenditure of gold rises on the heavenly body markets. Provided you sell gold items to a recycler, the recycler normally extracts the gold from the mixed alloy to effect purified gold. Nitric acid is much used to extract the gold. This causes a chemical reaction that can cause dangersome fumes. For, haul uttermost burden provided using this manner and isolated office in a well-ventilated world.
Instructions
1. Place granulated gold alloy in a beaker. Add nitric acid.5. Rinse the gold particles with hot water a few times to clear away any remaining sludge.
Add more nitric acid periodically as it evaporates or as signs of a reaction cease. The chemical reaction will create bubbles as the alloy metals dissolve.
3. Allow the solution to cool when the digestion is complete. The beaker will contain small beads of gold.
4. Pour off the majority of the acid, then filter the remaining contents of the beaker through a funnel equipped with filter paper. The gold particles will remain in the filter paper.
Stir the contents and allow the alloy to react with the nitric acid. The nitric acid will dissolve the common metals used to alloy with gold.2. Heat the solution on a hot plate set on low to help dissolve the alloy metals.
