Items related to Research papers from the Kent chemical laboratory of...
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. 1901 Excerpt: ...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 last experiment of the second series, may be expressed in this way: 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 the total amount of gas collected is about 2.5 per cent greater when potassium iodide is used than when water is used in the Will and Varrentrapp tube. This would indicate that some higher oxide of nitrogen is formed and is decomposed by the potassium iodide with a liberation of nitric oxide equal to about 2.5 per cent of the total volume of gas. In case the formation of this oxide were due to traces of air which oxidized the nitric oxide to nitrous acid, the volume o...
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- PublisherRareBooksClub.com
- Publication date2012
- ISBN 10 1236273109
- ISBN 13 9781236273109
- BindingPaperback
- Number of pages112
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