hydrogen ion

noun

Definition of hydrogen ion

1 : the cation H+ of acids consisting of a hydrogen atom whose electron has been transferred to the anion of the acid
2 : hydronium

Examples of hydrogen ion in a Sentence

Recent Examples on the Web Meanwhile, on the tube’s outer surface, the second catalyst—which contains vanadium, nitrogen, and iron—causes the hydrogen ions, the electrons, and nitrogen molecules piped in separately to form ammonia, all at atmospheric pressure. Robert F. Service, Science | AAAS, 6 Nov. 2019 As the carbon mixes into the ocean, chemical reactions in the water column produce more hydrogen ions and fewer carbonate ions, lowering pH levels and increasing acidity. oregonlive, 24 Jan. 2020 When that carbon is absorbed, a series of chemical reactions takes place that produces more hydrogen ions and leads to more acidic waters. Sarah Gibbens, National Geographic, 4 Mar. 2019 But hydrogen ions, single protons, have positive electric charges and naturally repel each other. Tim Folger, Discover Magazine, 24 Oct. 2018 The more hydrogen ions present, the more acidic the solution will be, and the lower the pH. SELF, 6 Sep. 2018 The sun and all other stars generate light by nuclear fusion, smashing hydrogen ions together to form helium, a process that releases energy. Tim Folger, Discover Magazine, 24 Oct. 2018 For starters, let’s talk about pH. A substance’s pH (potential hydrogen) is the measure of the hydrogen ion concentration within it. SELF, 6 Sep. 2018 The enormous clouds emit large amounts of ultraviolet light with a spectral line produced by hydrogen ions, known as a Lyman-alpha line. Jay Bennett, Popular Mechanics, 21 Sep. 2016

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'hydrogen ion.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of hydrogen ion

1896, in the meaning defined at sense 1

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Time Traveler for hydrogen ion

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The first known use of hydrogen ion was in 1896

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Dictionary Entries Near hydrogen ion

hydrogen iodide

hydrogen ion

hydrogen-ion concentration

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Cite this Entry

“Hydrogen ion.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hydrogen%20ion. Accessed 16 Oct. 2021.

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More Definitions for hydrogen ion

hydrogen ion

noun

Medical Definition of hydrogen ion

1 : the cation H+ of acids consisting of a hydrogen atom whose electron has been transferred to the anion of the acid
2 : hydronium

More from Merriam-Webster on hydrogen ion

Britannica.com: Encyclopedia article about hydrogen ion

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