Step 1:

The Concentration of $\"\\small$ is 0.30 M.

The Concentration of $\"\\small$ is 0.36 M.

Equilibrium constant $\"\\small$ .

pH definition:

It is the measure of the acidity and alkalinity of a solution.

pH is the negative log of the activity of the hydrogen ion in an aqueous solution.

$\"\\small$

Solution:

pH of the buffer system is 9.17.