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.

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hydronium ion British  

/ haɪˈdrəʊnɪəm /

noun

1. chem another name for hydroxonium ion

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Etymology

Origin of hydronium ion

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

Example Sentences

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

From Textbooks • Feb. 14, 2019

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

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

From Textbooks • Feb. 14, 2019

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

From Textbooks • Feb. 14, 2019

We have seen an introductory definition of an acid: An acid is a compound that reacts with water and increases the amount of hydronium ion present.

From Textbooks • Feb. 14, 2019