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hydronium ion

American

[hahy-droh-nee-uhm ahy-uhn, ahy-on] / haɪˈdroʊ ni əm ˌaɪ ən, ˌaɪ ɒn /

noun

the hydrogen ion bonded to a molecule of water, H 3 O + , the form in which hydrogen ions are found in aqueous solution.

hydronium ion British

/ haɪˈdrəʊnɪəm /

noun

chem another name for hydroxonium ion

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of hydronium ion

First recorded in 190510; < German Hydronium, contraction of Hydroxonium; see hydro- ², oxonium compound

Example Sentences

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Rearranging this equation to isolate the hydronium ion molarity yields the equivalent expression:

From Textbooks • Feb. 14, 2019

The ICE table defined x as equal to the bicarbonate ion molarity and the hydronium ion molarity:

From Textbooks • Feb. 14, 2019

The process is endothermic, and so the extent of ionization and the resulting concentrations of hydronium ion and hydroxide ion increase with temperature.

From Textbooks • Feb. 14, 2019

Are the concentrations of hydronium ion and hydroxide ion in a solution of an acid or a base in water directly proportional or inversely proportional?

From Textbooks • Feb. 14, 2019

Calculate the hydronium ion concentration and the hydroxide ion concentration in lime juice from its pH.

From Textbooks • Feb. 14, 2019

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023