Chromium(III) perchlorate is an
inorganic compound
An inorganic compound is typically a chemical compound that lacks carbon–hydrogen bondsthat is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as ''inorganic chemistry''.
Inorgan ...
, a salt with the chemical formula Cr(ClO
4)
3. It's hexahydrate Cr(ClO
4)
3·6H
2O is a cyan solid that dissolves in water.
Preparation
Chromium perchlorate can prepared by reacting
chromium(III) oxide or
chromium(III) hydroxide
Chromium(III) hydroxide is a gelatinous green inorganic compound with the chemical formula . It is a polymer with an undefined structure and low solubility. It is amphoteric, dissolving in both strong alkalis and strong acids.
:In alkali:
:In ac ...
with
perchloric acid
Perchloric acid is a mineral acid with the formula H Cl O4. It is an oxoacid of chlorine. Usually found as an aqueous solution, this colorless compound is a stronger acid than sulfuric acid, nitric acid and hydrochloric acid. It is a powerful oxid ...
:
:Cr
2O
3 + 6HClO
4 → 2Cr(ClO
4)
3 + 3H
2O
Hydrates
Chromium perchlorate has many hydrates, such as the hexahydrate Cr(ClO
4)
3·6H
2O
and a nonahydrate Cr(ClO
4)
3·9H
2O. All of them are cyan substances that are soluble in water.
Related compounds
*Cr(ClO
4)
3 will react with
NH3 in suitable conditions to form an orange hexammine complex Cr(ClO
4)
3·6NH
3. Other compounds with the general formula Cr(ClO
4)
3(NH
3)
x are also known. When x = 3, this compound is red, when x = 4 or 5, it is orange.
The hexammine complex will explode.
*Cr(ClO
4)
3 can also form complexes with
N2H4, such as purple Cr(ClO
4)
3·2N
2H
4.
*Cr(ClO
4)
3 can also form complexes with
urea
Urea, also called carbamide (because it is a diamide of carbonic acid), is an organic compound with chemical formula . This amide has two Amine, amino groups (–) joined by a carbonyl functional group (–C(=O)–). It is thus the simplest am ...
(CO(NH
2)
2), such as Cr(ClO
4)
3·6CO(NH
2)
2 with a hexagonal structure.
References
{{Perchlorates
Chromium(III) compounds
Perchlorates