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| Tetramminecopper(II) sulfate | |
|---|---|
| IUPAC name | tetraammine copper(2+) sulfate hydrate |
| Identifiers | |
| CAS number | 10380-29-7 |
| PubChem | |
| Properties | |
| Molecular formula | Cu(NH3)4SO4·H2O |
| Molar mass | 245.75 g/mol |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox references |
|
Tetramminecopper(II) sulfate, formula [Cu(NH3)4SO4 is an ionic compound containing the complex ion [Cu(NH3)42+.
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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Wikipedia content modification information:
- This page was last modified on 16 July 2008, at 18:48.
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