Essentials Of Medical Chemistry, Organic And Inorganic

Paperback | February 5, 2012

byLawrence Wolff

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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. 1899. Excerpt: ... Which are the fallacies of this test, and how detected? Albumin and sulphur compounds in the urine may cause a black precipitate of bismuth sulphide, Bi2S3. To detect them make the test, using a little litharge instead of the bismuth salt; if this blackens, the test is not available. Which are the two bismuth nitrates? Bismuth nitrate, Bi(NO.)3, a crystalline salt formed by the action of HN03 on bismuth. Bismuth subnitrate, BiONO3, usually of varying and indefinite composition, is a white powder consisting of microscopical crystals formed by precipitating Bi(N03)3 with water. What is bismuth generally contaminated with? With arsenic in greater or less proportion. What is bismuth subcarbonas TJ. S.? A white precipitate, (BiO)2C03, forming when a soluble salt of bismuth is precipitated by an alkaline carbonate. How may bismuth compounds and salts be recognized? Solutions give a white precipitate with alkaline hydrates insoluble in excess, turning yellow on boiling; H2S, and NH4HS give black precipitates of Bi2S3; largely diluted with water solutions give rise to precipitates of basic salts soluble in HN03. Platinum Group. Which are the most notable members of this group? Gold and platinum. Gold. What is gold? Gold, aurum, An, a. w. 196, is a soft yellow metal, sp. gr. 19.32, very ductile, melts at 1035 C. to a greenish liquid; is not acted on by oxygen directly nor by the acids, excepting nitro-hydrochloric acid; it forms various alloys harder than the pure metal. What are the chlorides of gold? The aurous chloride, AuC1; and the auric chloride, AuCl3, resulting on solution of gold in aqua regia. The auric chloride forms double salts with the alkaline chlorides, such as AuC13 KC1,AuC1.,NaC1, AuC13NH4C1; some of these are used medicinally; AuC13 is used as a...

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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. 1899. Excerpt: ... Which are the fallacies of this test, and how detected? Albumin and sulphur compounds in the urine may cause a black precipita...

Format:PaperbackDimensions:70 pages, 9.69 × 7.44 × 0.15 inPublished:February 5, 2012Publisher:General Books LLCLanguage:English

The following ISBNs are associated with this title:

ISBN - 10:0217473539

ISBN - 13:9780217473538

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