`pOH` water is `7.0at 298 K`. If water is heated to `350K`, which of the following should be ture?

Options

A. `pOH` will decrease.
B. `pOH` will increase.
C. `pOH` will remain `7.0`.
D. concentration of `H^(+)` ions will increase but that of `OH^(-)` will decrease.

Answer

A

Explanation

`[OH^(-)]=sqrt(K_(w))` in pure water.
So as temperature increases `K_(w)` decreases `implies [OH^(-)]` decreases.