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hydrofluoric acid

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hydrofluoric acid [¦hī·drə′flu̇r·ik ′as·əd]
(inorganic chemistry)
An aqueous solution of hydrogen fluoride, HF; colorless, fuming, poisonous liquid; extremely corrosive, it is a weak acid as compared to hydrochloric acid, but will attack glass and other silica materials; used to polish, frost, and etch glass, to pickle copper, brass, and alloy steels, to clean stone and brick, to acidize oil wells, and to dissolve ores.


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The warm evening and the heat of the raging fires nearby cause the hydrofluoric acid to evaporate and form a concentrated, colorless vapor, which, carried by the light westerly wind, moves slowly across the interstate and toward the blue-collar neighborhood north of Roosevelt Park.
The ore must be dissolved in hydrofluoric acid with some fluorine gas added to form uranium hexafluoride--a strange compound that sublimes (goes from a solid to a gas like "dry ice") at around 150[degrees]F.
Minimalism was ascendant as Wilmarth came of age, and, after spending the late '60s as assistant to Tony Smith, he began to make sculpture from square and rectangular panes of glass, etching an expressive surface with hydrofluoric acid.
 
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