# Why is the dissociation of water a limited process?

Jul 10, 2016

Why, because the $O - H$ bond is strong as bonds go.
$2 {H}_{2} O r i g h t \le f t h a r p \infty n s {H}_{3} {O}^{+} + H {O}^{-}$
Now this equilibrium has been precisely and accurately measured; $p {K}_{w} = {10}^{- 14}$ at $298 K$.
At temperatures higher than $298 K$, say $373 K$, how would you expect $p {K}_{w}$ to evolve? Remember that this is a bond breaking process.