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Reference.org
Molecular autoionization
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<p>In <a href="/facts/Chemistry/SrNqkGVm">chemistry</a>, molecular autoionization (or self-ionization) is a <a href="/facts/Chemical_reaction/GpqWlKrz">chemical reaction</a> between <a href="/facts/Molecule/N9ljSfFq">molecules</a> of the same <a href="/facts/Chemical_substance/EWcXU41d">substance</a> to produce <a href="/facts/Ion/3bePpDna">ions</a>. If a pure liquid partially <a href="/facts/Dissociation_(chemistry)/gDRGdeSN">dissociates</a> into ions, it is said to be self-ionizing.: 163 In most cases the <a href="/facts/Oxidation_number/W53W6s6V">oxidation number</a> on all atoms in such a reaction remains unchanged. Such autoionization can be <i><a href="/facts/Protic_solvent/oSApp96e">protic</a></i> (<a href="/facts/Hydron_(chemistry)/v5Qkumvm">H+</a> transfer), or <i>non-protic</i>. </p>