Research Papers from the Kent Chemical Laboratory of Yale University, المجلد 2Frank Austin Gooch C. Scribner's sons, 1901 |
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طبعات أخرى - عرض جميع المقتطفات
عبارات ومصطلحات مألوفة
acid present acid solution acidified action added alcohol alkaline aluminum ammonia ammonium chloride ammonium magnesium ammonium manganese phosphate ammonium oxalate ammonium salt amounts of ammonium analysis arsenious acid asbestos barium hydroxide barium oxalate benzoyl ether beryllium boiling boric acid burette calcium oxide Calculated carbon dioxide cent Chem cm³ cm³ cm³ cm³ of water color complete containing copper crystalline crystals decinormal determined dilution dissolved distillation dried Error estimation evaporation experiments ferrous filtered filtrate flask gave Gooch gram H₂O H₂SO heating hydrochloric acid ignition iodic acid iodide and iodate iodine iron Jour liquid magnesia mixture manganese manganous salt mannite melting mercuric method microcosmic salt molybdate neutral nickel nitric acid obtained oxalic acid oxygen permanganate portions potassium iodide precipitate pure reaction residue saturated separation sodium thiosulphate soluble strontium sulphate sulphide sulphuric acid TABLE taken temperature tion titration tube volatilized volume washed weighed Zeitschr zinc
مقاطع مشهورة
الصفحة 125 - The liquid was heated and stirred until the tiocky mass was changed to a crystalline condition. The addition of ammonia drop by drop, with constant stirring and heating, was continued until the manganese was all precipitated in crystalline form. A slight excess of ammonia was added and the liquid with the precipitate was allowed to stand for a half hour, cooling gradually or chilled in ice water. The precipitate was filtered off on asbestos under pressure, washed carefully in water made faintly ammoniacal,...
الصفحة 23 - ... water, a mixture of equal proportions of ether and strong hydrochloric acid was introduced, the liquid was saturated at 15° with gaseous hydrochloric acid, more ether was added to secure complete miscibilily, and more gas passed to perfect saturation.
الصفحة iii - University, a series of volumes has been prepared by a number of the Professors and Instructors, to be issued in connection with the Bicentennial Anniversary, as a partial indication of the character of the studies in which the University teachers are engaged.
الصفحة 70 - ... absorption flask, it was shaken frequently and was kept cool by standing in a dish of water and by pouring cold water over it from time to time. If, during the boiling, any fears are entertained as to the strength of the vacuum in the flasks, they may be easily allayed by opening momentarily the stop-cock of the funnel tube and noting the direction of the flow of water, contained in the funnel. After the boiling was ended, the atmospheric pressure was restored by allowing air, purified from carbon...
الصفحة 2 - To this solution sulphuric acid of half-strength was added hi such amount that the solution finally obtained, after adding the aqueous solution of potassium iodide subsequently, should still contain at least one-fourth of its volume of strong sulphuric acid. The Erlenmeyer beaker was placed upon a pane of window glass supported upon strips of wood about 1 cm. above the level of the work table, which was covered with white paper. A solution of approximately decinormal potassium iodide free from iodate...
الصفحة 81 - Soc., xxx., 775) to lose oxygen at a temperature (about 210° C.) to which the hydrated oxide must be heated to free it from water, or very nearly that at which the nitrate is converted into the dioxide; so that the chance of producing an undecomposed dioxide by the ignition of the hydrated dioxide (the form in which the dioxide generally appears in analytical processes), or of the nitrate, is small. Manganic oxide...
الصفحة iii - Sons, of New York. With the approval of the President and Fellows of Yale University, the series has been prepared by a number of the Professors and Instructors, to be issued in connection with the Bicentennial Anniversary, as a partial indication of the studies in which the University teachers are engaged. The list of volumes includes some of a special and technical nature, others of a more general character.
الصفحة 261 - ... pyrophosphate. This method may serve, therefore, for the accurate estimation of zinc. Cadmium may be estimated with accuracy as the pyrophosphate if the precipitate by microcosmic salt in the nearly neutral solution containing ammonium chloride in the proportion of ten grams to one hundred cubic centimeters is allowed to stand several hours before filtering. In this way all cadmium separates out from the solution as a beautiful crystalline mass of cadmium ammonium phosphate of ideal constitution....
الصفحة 200 - ... in the phosphorus indicated. The use of strong ammonia, moreover, we have shown to be both unnecessary and disadvantageous. Our experiments go to show that good results may be expected when the solution of the phosphate containing a moderate excess of the magnesium salt and not more than 5 to 10 per cent of ammonium chloride is precipitated by making it slightly ammoniacal — the precipitate being washed in slightly ammoniacal wash-water. In general, however, and especially when more ammonium...
الصفحة 331 - Obviously, however, the process should, so far as the reduction is concerned, be applicable to larger amounts of arsenic provided the strength of the acid is kept up proportionately. It is essential that the liquid at the end of the titration should contain approximately...