hydrogen ion

American  

noun

1. ionized hydrogen of the form H + , found in aqueous solutions of all acids.

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hydrogen ion British  

noun

1. an ionized hydrogen atom, occurring in plasmas and in aqueous solutions of acids, in which it is solvated by one or more water molecules; proton. Formula: H ⁺

2. an ionized hydrogen molecule; hydrogen molecular ion. Formula: H 2 ⁺

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Etymology

Origin of hydrogen ion

First recorded in 1895–1900

Example Sentences

The changes in molecular vibrations of the pMBA molecules, which vary with hydrogen ion adsorption, serve the function of memory and nonlinear waveform transformation for calculation.

From Science Daily • Apr. 26, 2024

In the reaction, a molecule of hydrogen gas collides with one deuterium ion to produce a hydrogen ion and a heavy, deuterium-containing hydrogen molecule.

From Scientific American • Apr. 4, 2023

For example, a coordinate covalent bond occurs when a water molecule combines with a hydrogen ion to form a hydronium ion.

From Textbooks • Feb. 14, 2019

Using this information, calculate the standard free energy change for the aqueous reaction of hydrogen ion with hydroxide ion to produce water.

From Textbooks • Feb. 14, 2019

Thus, in the general reaction between an acid and a base, the essential action is between the univalent hydrogen ion and the univalent hydroxyl ion.

From An Elementary Study of Chemistry by McPherson, William