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Potassium peroxide

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Title: Potassium peroxide  
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Subject: Potassium, Sodium peroxide, Potassium phosphate, Potassium octachlorodimolybdate, Potassium arsenite
Collection: Oxidizing Agents, Peroxides, Potassium Compounds
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Potassium peroxide

Potassium peroxide
Identifiers
CAS number  YesY
PubChem
EC number
Jmol-3D images Image 1
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 molar
entropy
So298
113 J·mol−1·K−1[2]
Std enthalpy of
formation
ΔfHo298
−496 kJ·mol−1[2]
Hazards
NFPA 704
0
3
1
OX
Related compounds
Other anions Potassium oxide
Potassium superoxide
Potassium chloride
Other cations Lithium peroxide
Sodium peroxide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 YesY   YesY/N?)

Potassium peroxide is an 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

  1. ^ Lide, David R. (1998). Handbook of Chemistry and Physics (87 ed.). Boca Raton, FL: CRC Press. pp. 477; 520.  
  2. ^ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22.  
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