`pOH` of `H_(2)O` is `7.0` at `298K`. If water is heated at `350 K`, which of the following statement should be true?

Options

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

Answer

A

Explanation

At 298 K , for pure water `Ph=Poh =7.` On increasing the temperature, the self ionisation of water increases thereby increasing the concentrations of `H_93)O^(+)` as well as `OH^(-)` ions. Consequenctly, at high temperature, the pH as well as pOH will be `lt7`.