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. 1869 Excerpt: ...it should be evaporated to dryness and the residue treated with oxalic acid again. (3.) According to Stohmann (Fresenius's Zeitschrift, 5, 306), potassium may be separated out at once by platinic chloride from a solution containing only alkalies and alkaline earths. Having precipitated the sulphuric acid completely as ...
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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. 1869 Excerpt: ...it should be evaporated to dryness and the residue treated with oxalic acid again. (3.) According to Stohmann (Fresenius's Zeitschrift, 5, 306), potassium may be separated out at once by platinic chloride from a solution containing only alkalies and alkaline earths. Having precipitated the sulphuric acid completely as above in the boiling solution of about 10 grms. of the substance, filter out the precipitate if the quantity of it is large; if but small, let it remain in the liquid; dilute the liquid, when cool, to 1000 c.c. and mix the whole thoroughly together. To 100 c.c. of the clear solution add an amount of platinic chloride containing about 2 grms. of the metal, evaporate the mixture nearly to dryness, and proceed as directed for the separation of potassium and sodium by platinic chloride ( 46 b). The method is based upon the fact that the double chlorides of calcium, barium, and magnesium, and platinum, are soluble in water and alcohol, as well as the double chloride of sodium and platinum. H. Separation of phosjihoric acid alone. (1.) Evaporate the hydrochloric acid solution, containing no great excess of iron over the phosphoric acid, to dryness on the water-bath, to eliminate silica, moisten the perfectly dried residue with about 2 c.c. of concentrated hydrochloric acid, and, after a while, add about 10 c.c. of concentrated nitric acid (Sp. Gr. = 1.2) for every 0.15 grm. of phosphoric acid supposed to be present, dilute with water, filter if necessary, and wash the residue of insoluble silica; evaporate the filtrate and washings nearly to dryness, dissolve the residue in about half as much concentrated nitric acid as was added before, and proceed to precipitate phosphoric acid with ammonic molybdate ( 61 b). (Fresenius's Zeitschrift, ...
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Add this copy of Agricultural Qualitative and Quantitative Chemical to cart. $61.07, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Newport Coast, CA, UNITED STATES, published 2016 by Palala Press.
