A treatise on chemistry. Vol. 1, The non-metallic elements / by Sir H.E. Roscoe & C. Schorlemmer ...

  • Henry Enfield Roscoe
Date:
1881
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Licence: Public Domain Mark

Credit: A treatise on chemistry. Vol. 1, The non-metallic elements / by Sir H.E. Roscoe & C. Schorlemmer ... Source: Wellcome Collection.

Provider: This material has been provided by University of Bristol Library. The original may be consulted at University of Bristol Library.

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    them in a porcelain tube (a h Fig. 172) heated to whiteness. The reaction which takes place is as follows :— Si02+2C+2CI2 - SiCl^ + 2C0. The escaping vapours and gases pass through an absorption tube (c) surrounded by a freezing mixture, and the product is separated from the excess of absorbed chlorine by shaking it up with metallic mercury and subseqiient distillation. Silicon tetrachloride is an acrid colourless liquid, fuming in the air, having a specific gravity at 0° of 1'52408 and boiling at 59°'57 (Thorpe.) The specific gravity of its vaj)our^ according Fig. 172. to Dumas, is 5*937. When thrown into water silicon tetrachlo- ride is at once decomposed, hydrochloric and silicic acids being formed, the latter depositing as a gelatinous mass. Silicon Tkiciiloiude, SioClg. Vapour Density = 134-1. 354 Friedel obtained this coriipound by gently heating the cor- responding tri-iodide with mercuric chloride.^ The samecompoimd was obtained by Troost and Hautefeuille ^ by passing the vajiour 1 Cmnptes Ite7idits, Ix.viii. lon. Ann. Chim. Phys. [5] vii. 461.