Watts' Dictionary of Chemistry Volume 3

Watts' Dictionary of Chemistry Volume 3

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1892 edition. Excerpt: ...preparations are impure. When heated, the yellow crystals become dark yellow, then orange, and finally garnet-red. Yvon (C. B. 76, 1607) says that the change of colour begins at 70, and assigns a definite temperature for each change of colour. Stroman (B. 20,2818) could not connect the different colours with definite intervals of temperature; he says that the salt prepared by him was pure yellow at 100. Sublimation begins at c. 190 according to Yvon, at o. 1100-120 according to Stroman. Hgl when moist is rapidly blackened by light. Hgl is very slightly soluble in water; insoluble in alcohol. It is easily decomposed to Hg and Hgl, c.ij. by HIAq, EIAq, and similar iodides. Heated rapidly Hgl gives a sublimate of Hg and Hgl.Hglj. Hgl is used in medicine. For medicinal purposes it mast be quite free from 11;;I.., which is a violent poison. Hebcdbo-hebcurio Iodide. Hgl.Hglj. A compound o Hg and I of this composition was obtained by Boullay (A. Ch. 2 84, 345) by adding KIAq containing I, in the ratio Kl: ', I, to HgNO, Aq. The same compound is said to be obtained by adding KIAq to HgN03Aq and digesting the pp. for some time in the liquid; also by rubbing together I l;;l, and I in the ratio 3HgIs: Hg. Mercuro-mercurio iodide is described as a yellow powder, insol. water and alcohol; unchanged in the dark, but becoming dark when exposed to light. When heated, it turns red, then melts, and may be sublimed unchanged, yielding crystals which are red when hot but become yellow on cooling. HIAq, and various iodides in solution, dissolve If;'I. leaving Hgl, and then decompose the Egl with separation of Hg. Mebcubio Iodide. HgI2. Mol. w. 452-86. 238 (Carnelley a. Williams, C. J. 33, 283). (339-359) (C. a. W., I.e.). S.Qr. red variety 6-2941 to 6-3004 at 0, 6-276...show more

Product details

  • Paperback | 330 pages
  • 189 x 246 x 18mm | 590g
  • Rarebooksclub.com
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236563271
  • 9781236563279