CUPRAMMONIUM - 2 reference results
Tetramminecopper(II) sulfate, formula [Cu(NH3)4]SO4 is an ionic compound containing the complex ion [Cu(NH3)4]2+.
Preparation
This compound can be prepared by adding concentrated ammonia solution, NH3, to a saturated aqueous solution of copper sulfate, CuSO4, until all the copper(II) hydroxide that is initially formed redissolves into a clear deep blue solution. After addition of concentrated ammmonia, crystals will precipitate at the bottom of the flask if kept in an ice-bath or refrigerator to lower the solubility of the complex. The crystals, if washing is desired, should only be washed with anhydrous ethanol containing a drop of concentrated ammonia. Washing with distilled water will lead to hydrolysis to copper(II) hydroxide and ammonia.Appearance
Tetramminecopper(II) sulfate is a deep blue crystalline solid. The surface is often effloresced and coverred with a powdery light blue layer, especially if kept for a long time. This is the hydrolysed copper(II) hydroxide, along with basic carbonates.External links
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Last updated on Wednesday July 16, 2008 at 11:48:16 PDT (GMT -0700)
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This article is licensed under the GNU Free Documentation License.
Last updated on Wednesday July 16, 2008 at 11:48:16 PDT (GMT -0700)
View this article at Wikipedia.org - Edit this article at Wikipedia.org - Donate to the Wikimedia Foundation
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