Question

How would we expect the autoprotolysis reaction of water.... `2H_2O(l) rightleftharpoons H_3O^+ + HO^-` .... to evolve with increasing temperature?

Answer 1

Consider the acid base equilibrium in water.......

Explanation:

`2H_2O rightleftharpoons H_3O^+ + HO^-`

At `298*K`, under standard conditions, `K_w=10^-14`. This is well-known.

The equilibrium reaction is clearly a BOND-BREAKING reaction, and given the extent of reaction (as revealed by `K_w`) it is thermodynamically uphill. At higher temperatures, we would thus expect the equilibrium to shift to the right, inasmuch as we are supplying some of the energy to break the strong `O-H` bonds.

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Answer 2

I looked into this topic in this answer here:

Explanation:

https://socratic.org/questions/do-acids-have-ph-above-7#359386