The Elements of Chemical Arithemtic With a Short System of Elementary Qualitat
The Elements of Chemical Arithemtic With a Short System of Elementary Qualitat
J Milnor James Milnor Coit
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39 (confirmed by blow-pipe test tin bead malleable ; anti- mony bead, brittle). Notice whether. It yields a green bead with borax or microcosmic salt ; it indicates chromium oxide, or chrome iron ore. It swims undissolved in a bead of microcosmic salt, silica and silicates (fuse with four times its weight of a mixture of K 2 CO 3 and Na 2 CO 3 . Allow to cool, dissolve in water, add HC1, and evaporate to dryness. Silica will separate out as a gelatinous mass). It yields a colorless bead, ' with... microcosmic salt, alu- mina. (Heated on charcoal, and moistened with CO(NO 3 ) 2 and reheated, it yields a blue, infusible mass. ) It is white and infusible, but quite unaltered by heat- ing. Lead sulphate yields, when heated with Na 2 CO 3 in blow- pipe reducing flame, malleable metallic bead. Barium sulphate fused with Na 2 CO 3 yields BaCO 3 . Boil the fused mass with water, filter and wash; the residue dissolved in HC1 yields BaCl 2 (flame color green), precipi- tated by SrSO 4 solution. Strontium sulphate fused with Na 2 CO 3 yields SrCO 3 .
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