Notes for students in chemistry : being a syllabus of chemistry compiled mainly from the manuals of Fownes-Watts, Miller, Wurz, and Schorlemmer / by Albert James Bernays.

  • Albert Bernays
Date:
1878
Catalogue details

Licence: Public Domain Mark

Credit: Notes for students in chemistry : being a syllabus of chemistry compiled mainly from the manuals of Fownes-Watts, Miller, Wurz, and Schorlemmer / by Albert James Bernays. Source: Wellcome Collection.

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    condenses O in its pores : Dobereiner lamp. AUoys. Lead and Bismuth to bo avoided in vessels of platinum, or on platinum foil. Also pliospliorus, or phosphates, with reduciiio; agents. Chlorides, i. Flatinous chlokide CLPt = 268. Of olive eolor, insoluble in water. Crystallizable double salts with 2CIK, 2ClNa, &c. By heating Cl^Pt at 235° C. as long as Cl^ is expelled. ^ PiATiNio cHLOiiiDE Cl.Pt = V)9- Red-bi'own, deliquescent piism-^. Unites with, 2ClH,Cl.,Pt, 60H,. Also with, 2ClK,Cl,,Pt: 2ClH^N,Cl,Pt. Also with, 2CICS, iClRb, 2CIL. All of these salts sutfieiently insoluble to enable us to determine the respec- tive metals.—[Basic ammoniacal derivatives from the clilorides. Platosamine PtH^No.OHj. Diplatosamine PtHioN4,20H2. Platinajiine PtH.lSr„,40H,. Diplatinamine hydrochloride PtHsN^2ClH (base'not isolated), &c.] Oxides, r. Platinot s oxide PtO = 213. Black hj^drate. From CUPt by 2HOK. 2. Pi.ATixic-oxiDE PtO, = 229. As brown hydrate 20H2,PtO„. Soluble in HOK. Salts well characterized. Sulphides, i. Pla- TiNors SULPHIDE SPt: black. 2. Platinic sulphide S2Pt. Brown-black. Somewliat soluble in alkaline sulphides. Platinum may be weighed, either as Pt, or as 2ClHjN,Cl4Pt wliich contains 44.17 per cent, of the metal. [XIV. Palladium Pd = 106.5. A dyad metal, discovered by Wollaston in 1803. Occasionally native in cubes and liexagonal plates. Usually forms J to r per cent, of the Platinum ori'S. Pd may be separated from all metals except Pb and Cu, by CjNjHg. Ignited, leaves Palla- dium. From palladium ores, after conversion into chlorides, and the removal of Platinic chloride by 2C1H4N, mercuhio CYANIDE CjNjHg precipitates palladious cyanide CjNjPd. In a solution containing tlie nitrates of Pb, Cu, Fe, and Pd, ferric and plumbic are precipitated by H3N, and the ammoniacal solution containing ammonia compounds of Cu and Pd, is pre- cipitated by CIH ; palladamine hydrochloride Cl2H,;N,jPd as a yellow, sparingly soluble salt is separated from which the metal is obtained by lieat. Wiiite, hard and lustrous. Noble metal: its o.xides into metal and oxygen by heat. Sp. gr. ir.8. Melts at 1360° C. Dissolved by NO2OH. Metallic palladium takes up 982 times its volume of Hydrogenium, forming an alloy. 'I'rom its increase in bulk by the absorption of H, which the Palladium undergoes when placed as the negative electrode in aniilulatod water, the density of the metal Hydrogenium is ascertained to be 0,733. Clilorides. i. Palladous chloride CljPd = [77.5. By evaporation of solution of Pd in aquaregia. Brown hydrate. Witli H3N a series of basic compounds like those witii Pt. Tims palladamine PdH„N20. 2. Palladio