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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    salts: Ferroixs carbonate COCOoFe)^ 116. White. Spathic iron- ore. Precipitated as greenish ]}ydrated carbonate by soluble ftirbonates. Ferrous hydrogen ortho-phosphate POCOHXOjFe), white: becomes blue. Ferrous ortho-silicate Si(0,Fe)J, is ■' finery slag. Ferric salts. Soluble. Ferric chloride Cl„Fe2 = 325, in brown scales. Cl,;Fe.,,60H2 in red, deliquescent crystals. Reduced by SH^. Cl^Fe, + CIH -|- SH. ^ 2(CLFe) + 3CIH+S. Ferric Iodide IgFe,. Ferric sulphate (S0j)3Fe„, yellowish-white, deliquescent. Coquimbite with 9OH2, silky-white mineral. Alums, in which Fe.Pj takes the place o'f ALOjin the common alums. Isnmorphous.' Thus: (SOJJv„Fe^ 24OH2. Ferric nitrate (N03)„Feo, r 2OH,. Insoluble ferrio salts'. Basic ferric sulphate already mentioned. Ferric phosphate POOjFe, 20H„, is white, and insoluble in acetic acid. Vivianite P0(OHXO2Fe'),:PO(O3Fe),8OH„. Ferric acid FeO._,(OH)2 is scarcely separable, so immediately does it evolve O, and deposit ferric hydrate. Potassium ferrate FeO^(OK), is very soluble in water, to amethystine solution. Thus : (0Pl)„Fe2 + ^Cl, + loKOH = 6C1K + 2FeO^K„ + 80H„. Iron is estimated as feluuc oxide Fe^Oa, containing 70 per cent of the metal. A ferrous, easily changed into a ferric salt by NO,OH. Thus: 6S0,Fe + 2NO2OH + jSO.H, = 2NO + 4OH, -1- 3(SO,)3Fe2. XX. Manganesium Mn = 55. Discovered by Gahn in 1774. Never native. Dyad and tetrad; also a pseudo-triad in manganic oxide Md„03. Greyisli- white, brittle metal. Sp.gr. 8.or. Oxydizes speedily inair; decomposes water slowly, and must be preserved under naphtha. Its alloy with iron, harder and more elastic than iron. Prep. by lieating mangauous carbonate to whiteness, with charcoal, in a smith's forge. Oxides. Two basic, two indifferent and two acids. I. Manganous oxide MnO = 71. A powerful base. Olive-green. Absorbs 0 when ignited and changes into brown jMujOi. By heating COO.,Mn in a stream of H to keep oft the air =z COj -f- MnO. Hydroxide (OHo)MnO is white, soluble in H3N, especially in presence of salts of H^N. Salts. Pink or rose- red. MnO is isomor[)hi>u3 witli MgO, ZnO, FeO. 2. Manganic oxide Mn203 =: 158. In acute, square-based octahcdra as Braunite. Also as manganite OHo.MuoOa, in brilliant, right-rhombic prisms. Very feeble base. Isomorphous with F02O3 and ALOg. Substitutes these bases in alums. Gives a violet color to glass, and a red color to the amethyst. 3. Manganous-manganic oxide Mn30j = MnO,Mn203, native in Hausmannite. Obtained by igniting MnO, COCOoMn) or JlUjO^. Not basic. 4. Manganese dioxide or peroxide MuO^