What is the pH of a solution in which [HA] = [A^-]?

Question

Quizplus · Accepted Answer

The pH of a solution is related to the concentration of H+ ions, which can be calculated using the dissociation constant (Ka) for the acid. In this case, we are given the concentrations of the acid (HA) and its conjugate base (A^-), but we don't know the value of Ka. However, we can calculate the ratio of the concentrations of the conjugate base and the acid (A^-/HA), which is equal to the dissociation constant (Ka) for the acid. Taking the negative logarithm of Ka gives us the pH of the solution. Therefore, the correct answer is C: pH = pKa = pK_a.

What Is the PH of a Solution in Which [HA]