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. 1907 Excerpt: ...throw, J. Am. Ch. S., 28, 135o; J. Am. Ch. S., 27, 1545 RESULTS. In the last experiment, 5 grams of sodium acetate were added in order to increase the conductivity of the solution and to ascertain what effect an excess of this salt would have, because, if the acetic acid were used to acidify the alkaline solution ...
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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. 1907 Excerpt: ...throw, J. Am. Ch. S., 28, 135o; J. Am. Ch. S., 27, 1545 RESULTS. In the last experiment, 5 grams of sodium acetate were added in order to increase the conductivity of the solution and to ascertain what effect an excess of this salt would have, because, if the acetic acid were used to acidify the alkaline solution obtained by the decomposition of molybdenite, a great deal of this salt would be present. The concordant results justified the next step, which was to decompose weighed amounts of pulverized molybdenite with sodium carbonate and nitrate, then take up the fusion with water, filter out the insoluble oxides, acidify with acetic acid, boil off the carbon dioxide, and electrolyze. The liquid poured off from the deposit of the sesquihy droxide was heated to boiling and precipitated with a hot solution of barium chloride. The Rapid Precipitation of Molybdenum Sesquioxide With the Use of a Rotating Anode. The procedure was the same as described under all the other metals. The solutions were acidulated with sulphuric acid and the conditions were as given here. The total dilution never exceeded 100 cubic centimeters. The rapidity with which the oxide separates and the ease with which the estimation is made make this electrolytic procedure vastly superior to other methods of determination. The Rapid Precipitation of Molybdenum With the Use of a Mercury Cathode. On electrolyzing an aqueous solution of molybdenum trioxide, acidulated with sulphuric acid, with a cathode of mercury, molybdenum itself enters fully into the cathode and forms with it a brilliant white amalgam. Therefore this metal can be directly weighed in this way. A water solution of sodium molybdate, acidulated with sulphuric acid, will serve also for this purpose. Accordingly, portions of sodiu...
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