Why is the dissociation of water a limited process?

1 Answer
anor277
Jul 10, 2016

Why, because the #O-H# bond is strong as bonds go.

Explanation:

#2H_2O rightleftharpoonsH_3O^(+)+HO^-#

Now this equilibrium has been precisely and accurately measured; #pK_w=10^(-14)# at #298K#.

At temperatures higher than #298K#, say #373K#, how would you expect #pK_w# to evolve? Remember that this is a bond breaking process.

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