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Bog, hæftet Colorimetric Determination of Acetylene and Its Application to the Determination of Water (Classic Reprint) af E. R. Weaver

Colorimetric Determination of Acetylene and Its Application to the Determination of Water (Classic Reprint)

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Excerpt from Colorimetric Determination of Acetylene and Its Application to the Determination of Water

In another experiment a limited amount of acetylene was passed into a cuprous-chloride solution containing hydroxylamine. The precipitate was filtered and then washed with w... Læs mere

Excerpt from Colorimetric Determination of Acetylene and Its Application to the Determination of Water

In another experiment a limited amount... Læs mere

Produktdetaljer:

Sprog:
Engelsk
ISBN-13:
9781334339653
Sideantal:
44
Udgivet:
01-11-2016
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Excerpt from Colorimetric Determination of Acetylene and Its Application to the Determination of Water

In another experiment a limited amount of acetylene was passed into a cuprous-chloride solution containing hydroxylamine. The precipitate was filtered and then washed with water contain ing a little ammonia and hydroxylamine without allowing air to come in contact with the precipitate. About 200 cc of wash water was required before the washings showed no trace of copper by the ferrocyanide test. After this the precipitate was further washed with 50 cc of dilute ammonia and then with 50 cc of water in order to remove hydroxylamine. The precipitate was then covered with 50 cc of dilute ammonia of the strength used for washing and air was bubbled through the liquid, portions being drawn off through the filter from time to time and tested for copper. Potassium ferrocyanide gave a positive test for copper almost immediately and in the course of about 15 minutes the liquid was colored distinctly blue by dissolved cupric-ammonium salts. Finally, the liquid was drawn off and the precipitate exposed to the air overnight. When water was added a large amount of cupric salt went into solution at once.

This experiment made it evident that in order to obtain accurate results in the determination of acetylene by the cuprous-chloride method it would be necessary to exclude air during the whole procedure.

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