Английская Википедия:Chromium(III) hydroxide
Шаблон:Short description Шаблон:Chembox
Chromium(III) hydroxide is a gelatinous green inorganic compound with the chemical formula Шаблон:Chem2. It is a polymer with an undefined structure and low solubility. It is amphoteric, dissolving in both strong alkalis and strong acids.[1]
- In alkali: <chem>Cr(OH)3 + OH- -> CrO2- + 2 H2O</chem>
- In acid: <chem>Cr(OH)3(OH2)3 + 3 H+ -> Cr(OH2)6^3+</chem>
It is used as a pigment, as a mordant, and as a catalyst for organic reactions.[2]
It is manufactured by adding a solution of ammonium hydroxide to a solution of chromium salt.Шаблон:Cn
Pure Шаблон:Chem2 is as yet (2020) unknown among the mineral species. However, three natural polymorphs of the oxyhydroxide, CrO(OH), are known: bracewellite, grimaldiite and guyanaite.[3][4][5][6]
References
Шаблон:Chromium compounds Шаблон:Hydroxides
Шаблон:Inorganic-compound-stub
- ↑ Rai, Dhanpat; Sass, Bruce M.; Moore, Dean A. "Chromium(III) hydrolysis constants and solubility of chromium(III) hydroxide" Inorganic Chemistry 1987, volume 26, pp. 345-9. Шаблон:Doi
- ↑ Шаблон:Cite book
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
- ↑ Шаблон:Cite web
