cover image

Potassium oxide

Chemical compound / From Wikipedia, the free encyclopedia

Dear Wikiwand AI, let's keep it short by simply answering these key questions:

Can you list the top facts and stats about Potassium oxide?

Summarize this article for a 10 years old

SHOW ALL QUESTIONS

Potassium oxide (K2O) is an ionic compound of potassium and oxygen. It is a base. This pale yellow solid is the simplest oxide of potassium. It is a highly reactive compound that is rarely encountered. Some industrial materials, such as fertilizers and cements, are assayed assuming the percent composition that would be equivalent to K2O.

Quick facts: Names, Identifiers, Properties, Structure, Th... ▼
Potassium oxide
Potassium Oxide spacefilling model
Names
IUPAC name
potassium oxide
Systematic IUPAC name
potassium oxidopotassium
Other names
potash, dipotassium oxide
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
ECHA InfoCard 100.032.012 Edit this at Wikidata
EC Number
  • 235-227-6
MeSH Potassium+oxide
UNII
UN number 2033
  • InChI=1S/2K.O ☒N
    Key: NOTVAPJNGZMVSD-UHFFFAOYSA-N ☒N
  • O([K])[K]
Properties
K2O
Molar mass 94.196 g·mol−1
Appearance Pale yellow solid
Odor Odorless
Density 2.32 g/cm3 (20 °C)[1]
2.13 g/cm3 (24 °C)[2]
Melting point 740 °C (1,360 °F; 1,010 K)[2]
decomposes from 300 °C[1]
Reacts[1] forming KOH
Solubility Soluble in diethyl ether[2]
Structure
Antifluorite cubic, cF12[3]
Fm3m, No. 225[3]
a = 6.436 Å[3]
α = 90°, β = 90°, γ = 90°
Tetrahedral (K+)
Cubic (O2−)
Thermochemistry
83.62 J/mol·K[4]
94.03 J/mol·K[4]
−363.17 kJ/mol[1][4]
−322.1 kJ/mol[1]
Hazards
Occupational safety and health (OHS/OSH):
Main hazards
 Corrosive, reacts violently with water
GHS labelling:
GHS05: Corrosive
Danger
H314
P260, P264, P280, P301+P330+P331, P303+P361+P353, P304+P340, P305+P351+P338, P310, P321, P363, P405, P501
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 3: Short exposure could cause serious temporary or residual injury. E.g. chlorine gasFlammability 0: Will not burn. E.g. waterInstability 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g. calciumSpecial hazard W: Reacts with water in an unusual or dangerous manner. E.g. sodium, sulfuric acid
3
0
1
W
Safety data sheet (SDS) ICSC 0769
Related compounds
Other anions
 Potassium sulfide
Potassium selenide
Potassium telluride
Potassium polonide
Other cations
 Lithium oxide
Sodium oxide
Rubidium oxide
Caesium oxide
Potassium peroxide
Potassium superoxide
Potassium ozonide
Related compounds
 Potassium hydroxide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)
Close ▲