| 释义 |
chromate Chromatics.|ˈkrəʊmeɪt|
[f. chromium or chrom-ic + -ate4.]
A salt of chromic acid; e.g. chromate of lead, PbCrO4, much used as a yellow pigment.
The chromates containing one equivalent of the acid, are called neutral chromate, normal chromate, mono-chromate, or meta-chromates. Chromates with two equivalents of the acid are called acid chromate, bi-chromate, or di-chromates; there are also hyperacid chromate chromates or tri-chromates.
1819J. G. Children Ess. Chem. Anal. 200 The chromate, the only one of these salts that is coloured, is yellow. 1840Henry Elem. Chem. II. 121 Chromate of lead is found native in fine orange-coloured prisms. 1871Tyndall Fragm. Sc. (ed. 6) I. iv. 103 A solution of the yellow chromate of potash. 1872Watts Dict. Chem. I. 938 Hyperacid chromate or Trichromate of Potassium. |