Aqua regia
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Aqua regia (lit. "royal water"), aqua regis (lit. "king's water"), or nitro-hydrochloric acid is a highly corrosive mixture of acids, a fuming yellow or red solution. The mixture is formed by freshly mixing concentrated nitric acid and hydrochloric acid,The acid concentrations in water differ, and indicative values could be 65% w/v for nitric acid and 35% w/v for hydrochloric acid — that is, the actual HNO3:HCl mass ratio is less than 1:2,</ref> usually in a volume ratio of 1:3. It was named so because it can dissolve the so-called royal or noble metals, gold and platinum. However, titanium, iridium, ruthenium, tantalum, osmium, rhodium and a few other metals are capable of withstanding its corrosive properties.
- See also: Wikipedia
- Related: Digger gold, Sulfuric acid
| Chemistry Comes Alive! Aqua Regia Chemistry Comes Alive! Aqua Regia jchemed.chem.wisc.edu/JCESoft/CCA/CCA3/MAIN/AQREGIA/PAGE1.HTM - Web |
| Aqua Regia dissolves Gold - Periodic Table of Vide... Aqua Regia dissolves Gold - Periodic Table of Videos www.youtube.com/watch?v=iwnKU89CCdI - Web |
| Demonstration of Gold Coin Dissolving in Acid (Aqu... Demonstration of Gold Coin Dissolving in Acid (Aqua Regia) www.youtube.com/watch?v=XoqU1GfIOkI - Web |
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