Chemistry
Methods to Determine the Dissociation Constant of a Weak Acid
Quick fact
The pH at the half-equivalence point of a titration is numerically equal to the pKa of the weak acid—this is a direct consequence of the Henderson-Hasselbalch equation.
Why this is interesting
Every time you squeeze a lemon into your tea, you're witnessing a weak acid in action—but how do chemists actually measure the 'strength' of such acids? The answer lies in a constant that can be unlocked through several clever experimental tricks.