hydronium ion

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hy·dro·ni·um ion

the hydrated proton, H3O+, a form in which hydrogen ion exists in aqueous solutions; also, H3O+·H2O, H3O+·2H2O, etc.
Synonym(s): oxonium ion

hydronium ion

(hi-dro'ne-um) [G. Hydronium, abbr. of Hydroxonium ] See: ion

hydronium ion

H3O+, a hydrated hydrogen ion. It is formed when an acid dissolves in water.
See also: ion
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An essential part of this description is the theory of Esin and Markov (16) regarding specific occupation of adsorption sites in the inner Helmholtz plane (IHP) and outer Helmholtz plane (OHP) by hydronium ions, hydroxide ions, electrolyte anions, and cations (two ion types for each Helmholtz plane have to be defined as preferentially adsorbed).
in the IHP, and the preferential adsorption of hydronium ions ([H.