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hydronium ion

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

noun

  1. 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

  1. 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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See Examples For:

This may be explained via Le Châtelier’s principle as a left shift in the water autoionization equilibrium resulting from the stress of increased hydronium ion concentration.

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

It can form both the hydronium ion, H3O+, and the hydroxide ion, OH− when it undergoes autoionization:

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

On the other hand, when dissolved in strong acids, it is converted to the soluble ion by reaction with hydronium ion:

From Textbooks Feb. 14, 2019

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