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Molecular autoionization

In chemistry, molecular autoionization 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. In most cases the oxidation number on all atoms in such a reaction remains unchanged. Such autoionization can be protic, or non-protic.

Examples
Protic solvents Protic solvents often undergo some autoionization (in this case autoprotolysis): • 2 H2O H3O+ + OH- • The self-ionization of water is particularly well studied, due to its implications for acid-base chemistry of aqueous solutions. • 2 NH3 NH4+ + NH2- Non-protic solvents • 2 PF5 PF6- + PF4+ • N2O4 NO+ + NO3- • ==See also==
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