aqueous cation H₃O⁺, the type of oxonium ion produced by protonation of water
Factsheet
Names IUPAC name
oxonium
Other names
hydronium ion
oxonium
Other names
hydronium ion
Identifiers
CAS Number 13968-08-6 Y
Names IUPAC name
oxonium
Other names
hydronium ion
oxonium
Other names
hydronium ion
Identifiers
CAS Number 13968-08-6 Y
Wikipedia
en.wikipedia.org › wiki › Hydronium
Hydronium - Wikipedia
3 weeks ago - In chemistry, hydronium (hydroxonium in traditional British English) is the cation ... H3O+, the type of oxonium ion produced by protonation of water.
American Chemical Society
acs.org › molecule-of-the-week › archive › h › hydronium-ion.html
Hydronium ion - American Chemical Society
November 19, 2025 - All acidic aqueous solutions contain protonated water, known commonly as the hydronium ion (H3O+). Brønsted acids release one or more of their protons (hydrogen ions), which combine with water molecules.
Does the hydronium ion (H3O+) actually exist? If so, how does H+ ion molecule bond with the water molecule, seeing as it has no electrons?
It's like any other atom, it borrows the electron from the oxygen. It's not a very powerful bond which is why H3O is a less common molecule compared to H2O More on reddit.com
The hydronium ion H3O+ is the strongest acid that can exist in aq...
The hydronium ion H3O+ is the strongest acid that can exist in aqueous solution because stronger acids dissociate by transferring a proton to water. What is the strongest base that can exist in aqueous solution? - McMurry Chemistry 8th Edition - solution to problem 55 in chapter 16. More on pearson.com
Hydronium ion concentration in pure water
What is your question? That, molarity was set such that you would get this concentration, in pure water, at a fairly arbitrary temperature? That is not how moles, or molarity, was defined. If your question is, was the neutral pH boundary set such that water under these conditions is neutral? Then, yes. More on reddit.com
Calculating Hydronium ion concentration from pH (and identifying molecules based on pH)
The first problem (pH one) is correct You started the second one (which form is basic/acidic) with the right premises and reasoning but you came to the wrong conclusions. Think again about what you labelled acidic and basic. Which proton could be lost by the acidic form? Which atom could receive a proton in the basic form? More on reddit.com
Is hydronium a cation?
Yes. Hydronium is a cation that has a formula of H3O+. Since it has a positive charge, it classifies as a cation.
study.com
study.com › courses › science courses › chemistry 101: general chemistry
Hydronium Ion | Definition, Formula & Calculation - Lesson | Study.com
Is H3O+ a cation?
Yes. Hydronium is a cation that has a formula of H3O+. Since it has a positive charge, it classifies as a cation.
study.com
study.com › courses › science courses › chemistry 101: general chemistry
Hydronium Ion | Definition, Formula & Calculation - Lesson | Study.com
Is H3O+ an acid or base?
H3O+ is the sign of an acid being present. The concentration of H3O+ determines the magnitude of the acidity of a solution.
study.com
study.com › courses › science courses › chemistry 101: general chemistry
Hydronium Ion | Definition, Formula & Calculation - Lesson | Study.com
Videos
The Hydronium Ion
02:37
H+ vs H3O+ (Hydrogen cation vs Hydronium ion) - YouTube
02:40
H3O+ Lewis Structure (Hydronium Ion) - YouTube
03:01
H+ Ion and Hydronium Ion - YouTube
03:03
What Are Hydronium Ions? - Chemistry For Everyone - YouTube
01:36
Hydronium ions | Solutions & acidity | meriSTEM - YouTube
Chemistry LibreTexts
chem.libretexts.org › bookshelves › physical & theoretical chemistry › supplemental modules (physical and theoretical chemistry) › acids and bases › acids and bases in aqueous solutions
The Hydronium Ion - Chemistry LibreTexts
January 30, 2023 - The hydronium ion is an important factor when dealing with chemical reactions that occur in aqueous solutions. Its concentration relative to hydroxide is a direct measure of the pH of a solution.
ScienceDirect
sciencedirect.com › topics › earth-and-planetary-sciences › hydronium-ion
Hydronium Ion - an overview | ScienceDirect Topics
The ability of carbonic anhydrase to catalyze the absorption of CO2 into water-containing liquids by conversion of CO2 plus water to bicarbonate and protons (or hydronium ions) and the release of CO2 from water-containing liquids containing bicarbonate and a source of protons is an inherent, defined property of carbonic anhydrase enzymes.
Gonzaga
guweb2.gonzaga.edu › faculty › cronk › CHEM101pub › hydronium.html
CHEM 101 - Hydronium ion
March 25, 2020 - This ionic equation is commonly abbreviated by chemists by elimination of a water molecule and letting H+(aq) represent hydronium ion:
Fiveable
fiveable.me › all key terms › organic chemistry › hydronium ion
Hydronium Ion Definition - Organic Chemistry Key Term | Fiveable
The hydronium ion, represented as H3O+, is a cation formed when a proton (H+) is added to a water molecule. It is a key player in the understanding of acid-base chemistry and the strength of acids and bases.
Fiveable
fiveable.me › all key terms › intro to chemistry › hydronium
Hydronium Definition - Intro to Chemistry Key Term | Fiveable
Hydronium is the positively charged ion formed when a proton (H+) is added to a water molecule (H2O), resulting in the formula H3O+. This ion plays a crucial role in understanding the concepts of pH and pOH, which are essential in the study of chemistry.
Biology As Poetry
biologyaspoetry.com › terms › hydronium_ion.html
Hydronium Ion - Biology As Poetry
H3O+; that is, a positively charged and therefore polar substance consisting of one oxygen atom and three hydrogen atoms. Hydronium ions are cations that form from the chemical reaction of hydrogen ions, and water and are found in aqueous solution.
University of Waterloo
uwaterloo.ca › chem13-news-magazine › december-2016-january-2017 › feature › hydronium-ion-yes-or-no
Hydronium ion: Yes or no? | Chem 13 News Magazine | University of Waterloo
December 7, 2018 - Streamlining the acid ionization equation with the H+ ion makes the weak acid the star of the show, with the emphasis on the loss of the proton from the acid. Referring to H+ as a proton also requires a bit of explanation and a few moments of digesting by most high school chemistry students, but they usually get the hang of it after a few examples. And now, many years later, I have joined the hydronium ion camp.
Reddit
reddit.com › r/nostupidquestions › does the hydronium ion (h3o+) actually exist? if so, how does h+ ion molecule bond with the water molecule, seeing as it has no electrons?
r/NoStupidQuestions on Reddit: Does the hydronium ion (H3O+) actually exist? If so, how does H+ ion molecule bond with the water molecule, seeing as it has no electrons?
March 3, 2023 -
The hydrogen ion (H+) is formed by the loss of an electron from the hydrogen atom, which has only one electron, and thus the hydrogen ion has no electrons. As far as I know, both ionic and covalent bonding require electrons. How then can we say that the hydronium ion exists?
Top answer 1 of 3
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It's like any other atom, it borrows the electron from the oxygen. It's not a very powerful bond which is why H3O is a less common molecule compared to H2O
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A hydrogen ion , H+ is informally also called a proton. In chemistry, it is called a hydron , as are any of hydrogen's isotopes. It has a positive charge from the single proton. They do not stick around long as they are super interested in bonding with just about anything around them.
Chemistry LibreTexts
chem.libretexts.org › campus bookshelves › portland community college › ch105: allied health chemistry ii › 5: acids and bases
5.2: Hydronium Ions - Chemistry LibreTexts
December 13, 2024 - Because a proton is only about one ten-thousandth as big as an average atom or ion, water dipoles can approach very close to a hydrogen ion in solution. Consequently the proton can exert a very strong attractive force on a lone pair of electrons in a water molecule—strong enough to form a coordinate covalent bond: The H3O+ formed in this way is called a hydronium ion (on the left in the figure below).
UCLA Chemistry
chem.ucla.edu › ~harding › IGOC › H › hydronium_ion.html
Illustrated Glossary of Organic Chemistry - Hydronium ion
Hydronium ion: H3O+. A strong acid; pKa = -1.8. The conjugate acid of water.
Pearson
pearson.com › all textbooks › mcmurry 8th edition › ch.16 - aqueous equilibria: acids & bases › problem 55
The hydronium ion H3O+ is the strongest acid that can exist - McMurry 8th Edition Ch 16 Problem 55
According to the Brønsted-Lowry theory, acids are proton donors, while bases are proton acceptors. In aqueous solutions, the strength of an acid is determined by its ability to donate protons to water, forming hydronium ions (H3O+).
Published July 23, 2022