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The self-ionization of water (also autoionization of water, autoprotolysis of water, autodissociation of water, or simply dissociation of water) is an ionization reaction in pure water or in an aqueous solution, in which a water molecule, H 2 O, deprotonates (loses the nucleus of one of its hydrogen atoms) to become a hydroxide ion, OH −.
In chemistry, molecular autoionization (or self-ionization) is a chemical reaction between molecules of the same substance to produce ions. If a pure liquid partially dissociates into ions, it is said to be self-ionizing. [1]: 163 In most cases the oxidation number on all atoms in such a reaction remains unchanged. Such autoionization can be ...
Download as PDF; Printable version; ... Doubly labeled water; E. ... Self-ionization of water; Specific ultraviolet absorbance; Stiff diagram;
Autoionization is a process by which an atom or a molecule in an excited state spontaneously emits one of the outer-shell electrons, thus going from a state with charge Z to a state with charge Z + 1, for example from an electrically neutral state to a singly ionized state.
Self-ionization of water – Autoprotolysis or exchange of a proton between two water molecules; Water-in-water emulsion; Water purification – Process of removing impurities from water; Water treatment – Process that improves the quality of water; Water (data page) – Chemical data page for water; Hard water – Water that has a high ...
Download as PDF; Printable version ... Self-ionization of water; Titration; ... The species distribution diagram shows that the concentrations of the two ions are ...
K w is the constant for self-ionization of water. There are two non-linear simultaneous equations in two unknown quantities [A 3−] and [H +]. Many computer programs are available to do this calculation. The speciation diagram for citric acid was produced with the program HySS. [11] N.B.
Water is the chemical substance with chemical formula H 2 O; one molecule of water has two hydrogen atoms covalently bonded to a single oxygen atom. [26] Water is a tasteless, odorless liquid at ambient temperature and pressure. Liquid water has weak absorption bands at wavelengths of around 750 nm which cause it to appear to have a blue color. [4]