Question

The pH of acetic acid was adjusted with concentrated NaOH, at what pH would you find an equal amount of acetic acid and its conjugate base? The pKa for acetic acid is 4.76

Answer 1

The pH at which you would find an equal amount of acetic acid and its conjugate base is equal to the pKa value of acetic acid, which is 4.76.

Step-by-step explanation:

The pH at which you would find an equal amount of acetic acid and its conjugate base can be determined using the Henderson-Hasselbalch equation and the pKa value of the acid. The Henderson-Hasselbalch equation is given by:

pH = pKa + log([A-]/[HA])

Since we want the concentrations of the acid and its conjugate base to be equal, [A-] = [HA]. Therefore, the Henderson-Hasselbalch equation simplifies to:

pH = pKa + log(1)

And since the logarithm of 1 is 0, the pH at which you would find an equal amount of acetic acid and its conjugate base is equal to the pKa value of acetic acid, which is 4.76.