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Autor Thema: Wie Silbernitrit herstellen?  (Gelesen 6378 mal)

megasynthese

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Wie Silbernitrit herstellen?
« am: 23. Mai 2009, 20:33:38 »
Hallo!
Ich habe 50g Silbernitrat hier und würde gerne Silbernitrit daraus herstellen!
Gibt's Alternativen zum Verfahren der Reduktion mit flüssigem Blei?

Mfg

megasynthese

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Re: Wie Silbernitrit herstellen?
« Antwort #1 am: 23. Mai 2009, 21:17:00 »
Hat sich erledigt:

Kornblum, Silver Nitrite Org. Syn. 38, 75 (1958)
Zitat
Under yellow photograhic light prepare a solution of 76 g (1.1 mol) of sodium nitrite in 250 ml water in a 1 L flask. Prepare a solution of 169.9 g of silver nitrate (1 mol) in 500 mL water. Slowly add the silver salt solution to the sodium nitrite solution with vigorous stirring. After addition is complete, cease stirring and allow the mixture to stand in the dark for 1 hour. A yellow precipitate will form. This is filtered with suction, collected, suspended in 250 ml fresh water, and filtered again. Repeat this washing again, collecting the solid after filtering. Dry the product to constant weight in a vacuum dessicator over KOH pellets. [Note: This means to place the pellets in the bottom of the dessicator, preferably in a glass dish. The ceramic stand on which the sample is supported is put in place and the product, spread thinly on a glass plate, is placed on the support. It does not mean to pour the product over KOH pellets. Vacuum is maintained on the desiccator during the drying period. Drying to constant weight means that you weigh the product, dry longer, weigh again, dry longer, weigh again, and so on until two consecutive weights agree closely; i.e., in the last decimal place to which your balance will weigh.] The drying may be hastened by washing the product once with methanol after the two water washings. Should yield about 134 g (87%). Store in a brown glass bottle and place in a dark storage area until ready to use.

Edit by Mephisto: Hier der Link zu Organic Syntheses, Vol. 38, p.75 (1958) (Note 2)
« Letzte Änderung: 23. Mai 2009, 21:52:55 von Mephisto »