Potassium tetraperoxochromate(V)
| 200px | |
| Identifiers | |
|---|---|
12331-76-9  |
|
| Properties | |
| K 3CrO 8 |
|
| Molar mass | 297.286 |
| Appearance | red brown |
| Vapor pressure | {{{value}}} |
|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
|
 verify (what is  ?) |
|
| Infobox references | |
Potassium peroxochromate, or potassium tetraperoxochromate(V), is an inorganic chemical having the chemical formula K3[Cr(O2)4]. A crystalline ionic solid with a brown color, it is the potassium salt of tetraperoxochromate(V), one of the few examples of chromium in the +5 oxidation state.[1]
Preparation
Potassium peroxochromate is prepared by reacting hydrogen peroxide with potassium chromate at low temperatures:
- 2 CrO2−
4 + 8 H
2O
2 → 2 [Cr(O
2)
4]2−
+ 8 H
2O
The intermediate tetraperoxochromate(VI) is reduced by hydrogen peroxide, forming tetraperoxochromate(V):[2][3]
- 2 [Cr(O
2)
4]2−
+ 2 OH−
+ H
2O
2 → 2 [Cr(O
2)
4]3−
+ 2 H
2O + O
2
Thus, the overall reaction is:
- 2 CrO2−
4 + 9 H
2O
2 + 2 OH−
→ 2 [Cr(O
2)
4]3−
+ 10 H
2O + O
2
The compound decomposes spontaneously at higher temperatures.
References
<templatestyles src="Asbox/styles.css"></templatestyles>
 |
This inorganic compound–related article is a stub. You can help Wikipedia by expanding it. |
