Autoionization of Water
Ø2
water molecules exchange H+
ØH2O +
H2O ⇄ H3O+ +OH-
ØKw= [H3O+][OH-]=
[H+][OH-]
ldissociation
constant for water
Øat
25C, [H+]=[OH-]=1.0 x 10-7
Øso
at 25C, Kw=1.0x10-14
Øhow
will change it with temperature?
