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self-ionization of water
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Self-ionization of water
The
self-ionization of water
(also
autoionization of water
, and
autodissociation of water
) is an
ionization
reaction in
pure water
or 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
-
. The
hydrogen nucleus, H
+
, immediately
protonates
another water molecule to form
hydronium
, H
3
O
+
. It is an example of
autoprotolysis
, and exemplifies the
amphoteric
nature of water.
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