Potassium oxide

Potassium oxide (K₂O) is an ionic compound composed of potassium and oxide ions. It reacts vigorously with water to form potassium hydroxide.

Potassium: Potassium is a soft, silvery alkali metal with one valence electron and high chemical reactivity. Potassium atoms lose electrons to form the K⁺ ions in K₂O.
Chemical formula: A chemical formula uses element symbols and subscripts to show the composition of a substance. K₂O's subscript records the two-to-one potassium-to-oxygen ratio.
Potash: Potash is a broad commercial name for potassium-rich materials, especially potassium carbonate and related salts. Potassium oxide content is commonly reported as a potash equivalent in materials analysis.
Potassium superoxide: Potassium superoxide (KO₂) is an ionic solid containing K⁺ and the superoxide ion O₂⁻. Unlike K₂O, it contains oxygen–oxygen bonded superoxide ions.
Oxide ion: The oxide ion is an oxygen atom carrying a 2− charge, O²⁻. Each oxide ion balances the charge of two potassium ions in K₂O.
Oxidation state: An oxidation state is a formal charge assigned to an atom under a set of electron-allocation rules. Potassium's +1 and oxygen's −2 states determine K₂O's neutral formula.
Glass: Glass is an amorphous solid, commonly made by melting silica with network-modifying ingredients. Potassium oxide can serve as a modifier in some glass compositions.
Potassium ozonide: Potassium ozonide (KO₃) is an ionic compound containing potassium ions and ozonide ions, O₃⁻. Its three-oxygen anion contrasts with K₂O's single oxide ion.
Ionic bond: An ionic bond is the electrostatic attraction between oppositely charged ions. The attraction between K⁺ and O²⁻ holds the compound together.
Stoichiometry: Stoichiometry is the quantitative relationship among substances in a chemical reaction. It quantifies the amounts of K₂O and water involved in hydrolysis.

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