Research Papers from the Kent Chemical Laboratory of Yale University Volume . 1

Research Papers from the Kent Chemical Laboratory of Yale University Volume . 1

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1901 edition. Excerpt: ...possibility of any local action between the potassium permanganate and caustic soda by means of which oxygen might be produced. The following tables give the results of experiments performed in this way. In the first column is given the absolute volume of the gas unabsorbed by the permanganate, in the second the per cent potassium nitrate reckoned as if the total volume were nitric oxide, and in the third the percentage reckoned from the absorbed nitric oxide. In cases where potassium iodide was used in the Will and Varrentrapp tube to break up any higher oxides of nitrogen that might be formed, the amount of iodine thus set free is given. In experiment (3) of Table I, the ferrous chloride was made by dissolving iron wire in boiled hydrochloric acid, and the potassium nitrate was dissolved in boiled water and added to the ferrous chloride. With this dilution, the reaction proceeded very slowly and it was found necessary to add several successive portions of hydrochloric acid before the reaction was complete, but the results as finally obtained are quite comparable with those obtained by a more rapid process. It will be seen by a glance at the tables that the best analytical results are obtained by the use of potassium iodide in the Will and Varrentrapp tube and calculation from the total volume of gas. The average of the results obtained above, omitting for a reason which will appear later the List experiment of the second series, may be expressed in this way: With XI. With water. Difference. Per cent from total gas... 99.96 97.7 2.26 " nitric oxide.. 97.63 96.0 2.63 Diff... 2.42 2.7 In each case there is an amount of gas equal to about 2.5 per cent of the total volume which is not nitric oxide. In whichever way reckoned more

Product details

  • Paperback
  • 189 x 246 x 6mm | 213g
  • United States
  • English
  • black & white illustrations
  • 1236857372
  • 9781236857378