| 单词 | fluor acid |
| 释义 | > as lemmasfluor acid fluor acid n. Chemistry †(a) any acid which is fluid at room temperature, or is not susceptible to crystallization (obsolete); (b) = hydrofluoric acid at hydrofluoric adj. (now chiefly historical). [In sense (a) after French †acide fluor (1766 in the passage translated in quot. 1771).] ΘΚΠ the world > matter > chemistry > elements and compounds > hydrogen > [noun] > in chemical combination with fluorine fluor acid1771 1771 J. Keir tr. P. J. Macquer Dict. Chem. I. 46 Fluor acids [Fr. Des acides fluors], or what are properly called essential salts, which are nothing else than concrete acids rendered solid by a portion of oil and earth. 1775 J. Priestley Exper. & Observ. Air II. Introd. xli Corks and tubes, will be found very sufficient, and much less expensive; especially with the fluor acid; which corrodes glass. 1791 S. Tennant in Philos. Trans. (Royal Soc.) 81 184 A compound..of fluor acid and calcareous earth. 1828 N. Webster Amer. Dict. Eng. Lang. Fluor-acid, the acid of fluor. 1922 T. M. Lowry Inorg. Chem. xxiv. 295 The hydride, hydrogen fluoride, HF, has been known under the name of fluor acid as an agent for etching glass since 1670... The element was, however, not isolated until 1886. 2005 J. Plunkett in S. Popple & V. Toulmin Visual Delights Two xiv. 180 The glass would be treated with fluor acid in order that it could be painted like an etching. < as lemmas |
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