Volume 1
A treatise on chemistry / by H.E. Roscoe and C. Schorlemmer.
- Henry Enfield Roscoe
- Date:
- 1877-1892
Licence: Public Domain Mark
Credit: A treatise on chemistry / by H.E. Roscoe and C. Schorlemmer. Source: Wellcome Collection.
560/792 page 544
![Fig. 168. same body is formed, also with the evolution of light and heat, when hydrochloric acid gas is passed over amorphous boron (Wohler and Deville). In order to prepare boron trichloride a current of dry chlorine gas is passed over a strongly heated mixture of boron trioxide and charcoal:—3 with a coating of the melted trioxide (Wohler). Concentrated nitric acid exerts no action upon it, and even acpia regia attacks' it but slowly. Boiling caustic soda solution likewise does not act upon it, but if it is fused with the solid alkali it dissolves slowly with formation of sodium borate and with evolution of hydrogen. A hydride of boron, BHS, has lately been described by F. Jones.1 BORON AND CHLORINE. .Boron Trichloride, BC13. Vapour Density = 58‘55. 342 Amorphous boron takes fire spontaneously when brought into chlorine gas with formation of boron trichloride,2 and this BA + 3C + 3CL = 2BCL + SCO. 1 Chem. Hoc. Journ. 1870, i. 41. 2 Berzelius, Pogg. Ann., ii. 147. 'J Dumas, Ann. Chim. Phys. [2], xxxi. 436, and xxxiii. 376.](https://iiif.wellcomecollection.org/image/b28122409_0001_0562.jp2/full/800%2C/0/default.jpg)
