Potassium peroxide
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potassium peroxide
(pə′tas·ē·əm pə′rāk′sīd)
(inorganic chemistry) K2O2 Yellow mass with a melting point of 490°C; decomposes with oxygen evolution in water; used as an oxidizing and bleaching agent.
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Potassium peroxide
| Potassium peroxide | |
|---|---|
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Potassium peroxide |
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| Identifiers | |
| CAS number | 17014-71-0  |
| PubChem | 28202 |
| EC number | 241-089-8 |
| Jmol-3D images | Image 1 |
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| Properties | |
| Molecular formula | K2O2 |
| Molar mass | 110.196 g/mol |
| Appearance | yellow amorphous solid |
| Melting point |
490 °C |
| Solubility in water | reacts with water[1] |
| Structure | |
| Crystal structure | Orthorombic |
| Space group | Cmca, oS16 |
| Thermochemistry | |
| Std enthalpy of formation ΔfH |
−496 kJ·mol−1[2] |
| Standard molar entropy S |
113 J·mol−1·K−1[2] |
| Hazards | |
| NFPA 704 |
 0
3
1
OX
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| Related compounds | |
| Other anions | Potassium oxide Potassium superoxide Potassium chloride |
| Other cations | Lithium peroxide Sodium peroxide |
 (verify) (what is:  / ?)Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
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| Infobox references | |
Potassium peroxide is an inorganic compound with the molecular formula K2O2. It is formed as Potassium reacts with oxygen in the air, along with potassium oxide (K2O) and potassium superoxide (KO2).
Potassium peroxide reacts with water to form potassium hydroxide and oxygen:
2 K2O2 + 2 H2O → 4 KOH + O2
References
- ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 477; 520. ISBN 0-8493-0594-2.
- ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed.. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X.
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