Kc[H2O]2 =
[H3O+][OH-]
Defining the ion-product constant of water
Kw =
A change in [H3O+] causes an inverse change in [OH-].
= 1.0 x 10-14 at 25 oC
In an acidic solution, [H3O+] > [OH-]
In a basic solution, [H3O+] < [OH-]
In a neutral solution, [H3O+] = [OH-]
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