Aqua regia (Latin, lit. "royal water" or "king's water") is a mixture of nitric acid and hydrochloric acid, optimally in a molar ratio of 1:3. Aqua regia is a yellow-orange fuming liquid. Aqua regia was so named by alchemists because it can dissolve the noble metals gold and platinum. However, aqua regia does not dissolve or corrode titanium, iridium, ruthenium, rhenium, tantalum, niobium, hafnium, osmium, or rhodium.
近义、反义、联想词
近义词
n.
acid
英英词典
aqua regia n.
a yellow fuming corrosive mixture of nitric and hydrochloric acid that dissolves metals (including gold)