Which of the following is the ionization constant expression for water?
Kw = [ H+ ] [ OH- ]
Kw = [ H2O ] / [ H+ ] [ OH- ]
Kw = [ H2O ] [ H2O ]
Kw = [ H+ ] [ OH- ] / [ H2O ]
none of the above
1
Expert's answer
2015-07-13T09:37:13-0400
None of the above. The correct answer should be Kw=[H3O+][OH-]. These ions are produced by self-ionization reaction of two water molecules. This process is called autoprotolysis: H+ from one molecule protonates another water molecule. The result is composition of two ions: H3O+ and OH-.
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