`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 seven
D. Concentration of `H^(o+)` ions will increae but that of `overset(Theta)OH` will decrease.

Answer

A

Explanation

On heating `H_(2)O` at `350K`, the selt ionisation of `H_(2)O`, increases
`H_(2)O +H_(2)O hArr H_(3)O^(o+) + overset(Theta)OH`
So the concentration of `[H_(3)O^(o+)]` and `[overset(Theta)OH]` both increases, so the `pH` increases or `pOH` decreases.