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Aqua regia (Laitin an Auncient Italian, lit. "regal watter"), aqua regis (Laitin, lit. "king's watter"), or nitro-hydrochloric acid is a heichly corrosive mixtur o acids, a fumin yellae or reid solution. The mixtur is furmed bi freshly mixin concentratit nitric acid an hydrochloric acid,[1] optimally in a vollum ratio o 1:3. It wis named sae acause it can dissolve the sae-cried ryal or noble metals, gowd an platinum. Houiver, titanium, iridium, ruthenium, tantalum, osmium, rhodium an a few ither metals are capable o wistandin its corrosive properties.[2]
Names | |
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IUPAC name
nitric acid hydrochloride | |
Ither names
aqua regis, nitrohydrochloric acid | |
Identifiers | |
CAS Nummer |
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3D model (JSmol) |
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PubChem CID |
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SMILES
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Properties | |
HNO3+3 HCl | |
Appearance | reid, yellae or gowd fumin liquid |
Density | 1.01–1.21 g/cm3 |
Meltin pynt | −42 °C (−44 °F; 231 K) |
Bylin pynt | 108 °C (226 °F; 381 K) |
Solubility in watter |
miscible in watter |
Vapour pressur | 21 mbar |
Hazards | |
NFPA 704 |
0
3
0 OX |
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
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