Skeleton notes on analytical chemistry : for students in medicine / by Albert J. Bernays.

  • Albert Bernays
Date:
1879
Catalogue details

Licence: Public Domain Mark

Credit: Skeleton notes on analytical chemistry : for students in medicine / by Albert J. Bernays. Source: Wellcome Collection.

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    RECAPITULATION OF TESTS FOR BASKS. sulphuric, iicid, white PbSO^. n. CuS brown-black. Salts blue or green. NH.Oll deep-blue in excess. K,,Ofy red-brown CiuOfy. 13. HgS black insol. in IISO^: carefully prec. by H„S, white, yellow, orange, black. KI scarlet. SuClj gives Hg„Glj and 2Hg. Group III. lu presence of NH^Cl, by NH^OH as hydroxides. Fe„(OH),: [Mn,(OH)J ; AL(OH)„; Cr,(OH),. [BeO or GO]. 15. Fe,(OH),, red-brown, bulky, in=ol. in KOH. K.,Cty, Prus- sian-blue. (NH^),S„ Fe.,S3,5H..O black. Ji;. Al^COH)^, white, soluble in KOH. Salts colorless. 18. CrjCOH)^, bluish-green, soluble with emerald-green color in KOH. Groi'P IV. Even in presence of NH^Cl, (NHJ.S.' precipitates as sulphides ZnS, MnS, FeS, CoS, NiS, [US. V^S^]. 20. ZnS, H,0, white, insoluble in KOH. (NHJ^COj, while. KOH, white. NH^OH white, soluble without color. 21. MnSiHjO, flesh-color, browning, sol. in acetic acid even. KOH white, insoluble, browning. NH^OH, white, sol. browning. 22. FeS, H„0, black, very soluble in HCl. K^Fcdy, TurnbuU's blue. K^Cfy bluish-white. 25. CoS.HjO, black, insoluble in weak HCl. Solutions pink, red or blue,—on dilution pink. NH4OH in excess to reddish-brown liquid. Na^COg lilac precipitate. KgFcdy brownish-red. K^Cfy greenish. 24. NiS,H.,,0, black, with difiSculty soluble in HOI. Solutions green. NH4OH in excess, plum-colored solution. K^Fcdy yelluwish-brown. K4Cfy greenisii-white. Group V. Metals precipitated as carbonates by NajCOj. BaCOj. SrCO,. CaCOj. Mg(0H)2,MgC03. A. (NH4)2C03 precipitates Ba, Sr and Ca. 27. BaCOj, white. CaS04, immediate pr. of BaSO^. Yellow- green color to flame. 2HF,SiF4 white precipitate. 28. SrC03, white. CaSOj a precipitate after standing or on heating. Crimson color to flame. 29. CaCOj whit.e. CaS04 no reaction. (NH4)2Cj04 white, insoluble in acetic acid. B. (NH4)2C03 no precipitate, Mg. 30. MgC03, white. NH4OH white Mg(OH): no prec. in acid solutions. NH4C1-FNH40H no prec. but on addition of Na2HP04, white, crystalline NH4MgP04, eH^O. Group VI. Potassium group, including NH4, K, L, Rb, Cs, and Na. 31. NH4OH, alkaline, odorous of hartshorn, blues red litmus and fumes with HCl. Salts decomposed by NajCOj. Volatile. PtClj, yellow 2NH4Cl.PtCl4. 32. K looked for when absence of NH4 salt proved. Violet color to flame. PtCl4 yellow 2KCI, PtCl4. 36. Na. Salts: yellow color to flame. Only precipitated by KjHjSb^O;.
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