Chemistry:Chromium(III) perchlorate
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| Names | |
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| Other names
Chromium(III) perchlorate; Chromium triperchlorate
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| Properties | |
| Cr(ClO4)3 | |
| Molar mass | 350.3489 |
| Appearance | cyan solid |
| anhydrous: 58 g/100 mL (25 °C) hexahydrate: 130 g/100 mL (20 °C)[1] | |
| Solubility | soluble in ethanol |
| Hazards | |
| Main hazards | poisonous |
| GHS pictograms |  
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| GHS Signal word | Danger |
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| Related compounds | |
Related compounds
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chromium(III) chloride chromium chlorate |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
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Chromium(III) perchlorate is an inorganic compound, a salt with the chemical formula Cr(ClO4)3. It's hexahydrate Cr(ClO4)3·6H2O is a cyan solid that dissolves in water.
Preparation
Chromium perchlorate can prepared by reacting chromium(III) oxide or chromium(III) hydroxide with perchloric acid:
- Cr2O3 + 6HClO4 → 2Cr(ClO4)3 + 3H2O
Hydrates
Chromium perchlorate has many hydrates, such as the hexahydrate Cr(ClO4)3·6H2O[1] and a nonahydrate Cr(ClO4)3·9H2O.[3] All of them are cyan substances that are soluble in water.
Related compounds
- Cr(ClO4)3 will react with NH3 in suitable conditions to form an orange hexammine complex Cr(ClO4)3·6NH3.[4] Other compounds with the general formula Cr(ClO4)3(NH3)x are also known. When x = 3, this compound is red, when x = 4 or 5, it is orange.[5] The hexammine complex will explode.[5]
- Cr(ClO4)3 can also form complexes with N2H4, such as purple Cr(ClO4)3·2N2H4.[6]
- Cr(ClO4)3 can also form complexes with urea (CO(NH2)2), such as Cr(ClO4)3·6CO(NH2)2 with a hexagonal structure.[7]
References
- ↑ 1.0 1.1 William M. Haynes, ed (2016). CRC Handbook of Chemistry and Physics (97 ed.). CRC Press. pp. 4–57. ISBN 9781498754293. https://books.google.com/books?id=VVezDAAAQBAJ&pg=SA4-PA57.
- ↑ Elements, American. "Chromium Perchlorate Hexahydrate" (in en). https://www.americanelements.com/chromium-perchlorate-hexahydrate-55147-94-9.
- ↑ Chromium Perchlorate
- ↑ Handbook of inorganic substances 2017 – Google Sách.
- ↑ 5.0 5.1 Macintyre, Jane E. (23 July 1992) (in en). Dictionary of Inorganic Compounds. CRC Press. p. 3278. ISBN 978-0-412-30120-9. https://books.google.com/books?id=9eJvoNCSCRMC&pg=PA3278.
- ↑ "Error: no
|title=specified when using {{Cite web}}". http://chemistry-chemists.com/chemister/Neorganika/inorganic-hydrazine-derivatives-2014.pdf.. - ↑ Barbieri, G. A. (17 September 1913). "Über Eisen-Harnstoffverbindungen". Chemisches Zentralblatt (12): 1035. http://delibra.bg.polsl.pl/Content/17238/P-52_1913-2_Nr12.pdf.
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