hydracidn.
/hʌɪˈdrasɪd/ Chemistry.
a. A term applied to an acid containing hydrogen, to distinguish it from an oxyacid, or oxacid, containing oxygen; now esp. to the halogen acids, or simple compounds of hydrogen with chlorine, bromine, iodine, fluorine, or cyanogen.
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the world > matter > chemistry > chemical substances > acids > [noun] > acids-named > containing hydrogen or hydracids
hydracid1823
maleic acid1838
hydro-acid1845
hydrogen acid1866
fluoresceic acid1889
maleinic acid1889
1823 W. Henry Elements Exper. Chem. (ed. 9) I. vii. 365 These results are calculated on the supposition that hypo-phosphorous or per-phosphorous acid is a binary compound of oxygen and phosphorus; but it is doubtful whether it may not be a triple compound of oxygen, phosphorus, and hydrogen, or a hydracid.
1831 T. P. Jones New Conversat. Chem. xxiii. 231 There are several..acids in which hydrogen performs the office once supposed to belong exclusively to oxygen..Acids of this kind are called hydracids.
1854 J. Scoffern in Orr's Circle Sci., Chem. 351 Hydrosulphuric acid is the first hydrogen acid, or hydr-acid, that has..come under our notice.
1864–72 H. Watts Dict. Chem. II. 669 Ampère, in 1810, suggested that it (HF) was a hydracid analogous to hydrochloric acid; and this..was..confirmed by Davy.
1889 H. F. Morley & M. M. P. Muir Watts' Dict. Chem. (rev. ed.) II. 702/1 The name [hydracid] is more particularly applied when it is desired to distinguish between two classes of compounds of the same element,..thus we speak of the oxy-acids and the hydracids of the halogen elements.
b. attributive or adj. Of or belonging to a hydracid.
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the world > matter > chemistry > chemical substances > acids > [adjective] > of or relating to named acids > of or belonging to a hydracid
hydracid1854
1854 J. Scoffern in Orr's Circle Sci. 352 The attempt to assimilate oxyacid salts with the type of hydracid salts.
This entry has not yet been fully updated (first published 1899; most recently modified version published online March 2022).
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