Question

How do you determine pka value of weak acid using ph meter?

Answer 1

Since strong acids, by definition, ionize completely, pKa is more important as a characteristic of weak acids. You can use it to predict an acid's pH if you know the concentration.

Calculate the pKa with the formula pKa = -log(Ka). For example, pKa = -log(1.82 x 10^-4) = 3.74