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

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

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

Species above water but below hydronium ion are weak acids, undergoing partial acid ionization, wheres those above hydronium ion are strong acids that are completely ionized in aqueous solution.

From Textbooks • Feb. 14, 2019

When we add acid to a solution of methyl orange, the increased hydronium ion concentration shifts the equilibrium toward the nonionized red form, in accordance with Le Châtelier’s principle.

From Textbooks • Feb. 14, 2019

As defined in the ICE table, x is equal to the equilibrium concentration of hydronium ion:

From Textbooks • Feb. 14, 2019