Chromium(III) perchlorate
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| Names | |
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| Other names Chromium(III) perchlorate; Chromium triperchlorate | |
| Identifiers | |
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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 | |
| Occupational safety and health (OHS/OSH): | |
Main hazards | poisonous |
| GHS labelling:[2] | |
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| Danger | |
| H271, H315, H319, H335 | |
| Related compounds | |
Related compounds | 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). | |
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
[edit]Chromium perchlorate can prepared by reacting chromium(III) oxide or chromium(III) hydroxide with perchloric acid:
- Cr2O3 + 6HClO4 → 2Cr(ClO4)3 + 3H2O
Hydrates
[edit]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
[edit]- 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 urea (CO(NH2)2), such as Cr(ClO4)3·6CO(NH2)2 with a hexagonal structure.[7]
References
[edit]- ^ a b William M. Haynes, ed. (2016). CRC Handbook of Chemistry and Physics (97 ed.). CRC Press. pp. 4–57. ISBN 9781498754293.
- ^ Elements, American. "Chromium Perchlorate Hexahydrate". American Elements. Retrieved 11 December 2021.
- ^ Chromium Perchlorate
- ^ Handbook of inorganic substances 2017 – Google Sách.
- ^ a b Macintyre, Jane E. (23 July 1992). Dictionary of Inorganic Compounds. CRC Press. p. 3278. ISBN 978-0-412-30120-9.
- ^ chemistry-chemists.com https://web.archive.org/web/20200326015850/http://chemistry-chemists.com/chemister/Neorganika/inorganic-hydrazine-derivatives-2014.pdf. Archived from the original on 2020-03-26.
{{cite web}}: Missing or empty|title=(help) - ^ Barbieri, G. A. (17 September 1913). "Über Eisen-Harnstoffverbindungen" (PDF). Chemisches Zentralblatt (12): 1035.