The buffering capacity of a weak acid and its conjugate base is strongest when the pH = pKa. Question 10 options: True False

The statement is True.

Explanation:

The buffering capacity of a solution is maximized when the pH is equal to the pKa of the weak acid. This is due to the Henderson-Hasselbalch equation, which describes the relationship between the pH, pKa, and the concentrations of the acid and its conjugate base:

$\text{pH} = \text{pKa} + \log \left( \frac{[\text{A}^-]}{[\text{HA}]} \right)$

When pH = pKa, the concentrations of the weak acid ($[\text{HA}]$) and its conjugate base ($[\text{A}^-]$) are equal, leading to a maximum buffering capacity.

Therefore, the ultimate answer to the question is True.