At half-Equivalence the pH is equal to pKa, because the concentrations of Acid and conjugate base are equal, thus making the Log term in the Hen-Has equation zero.
pH at Equivalence for a Weak acid/strong base titration is greater than 7.
pH at Equivalence for a weak base/strong acid titration is less than 7.
Titrations: Weak Acid and Strong Base
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