| 释义 |
replaceable, a.|rɪˈpleɪsəb(ə)l|
[f. replace v. + -able.]
a. That may be replaced.
1805W. Taylor in Ann. Rev. III. 236 The concurring individuals..appear but as insignificant and replaceable instruments. 1871Roscoe Elem. Chem. 159 The four atoms of hydrogen being replaceable..by metals.
b. absol. in Chem., denoting those hydrogen atoms in an acid which may be replaced by base.
1895W. A. Tilden Introd. Study of Chem. Philos. (ed. 8) xv. 140 Tartaric acid is a case of similar kind. Its molecular formula cannot be less than C4H6O6, on account of the existence of the double tartrates, which prove that the acid contains two replaceable basic hydrogen atoms. 1930W. R. Anderson School Cert. Chem. iv. 47 With sulphuric acid we can get a salt by turning out half the hydrogen present, but this salt still contains replaceable hydrogen. 1962Parkes & Harrison Basic Physical & Inorg. Chem. xv. 202 A normal salt is one in which all the replaceable hydrogen of the acid and the hydroxyl (or oxygen) of the base have reacted to form water. |