Final answer:
The pH will be basic at the equivalence point in the titration of a weak acid with a strong base, making option c the correct answer.
Step-by-step explanation:
The pH at the equivalence point in a titration depends on the strengths of the acid and base involved. When a strong acid is titrated with a strong base (or vice versa), the pH at the equivalence point is neutral, which is pH 7. However, the titration of a weak acid with a strong base results in a basic pH at the equivalence point, which is higher than 7. This is because the conjugate base of the weak acid remains in the solution and affects the pH. On the other hand, when a weak base is titrated with a strong acid, the pH at the equivalence point will be acidic (less than 7) due to the presence of the conjugate acid of the weak base.
Therefore, the correct answer to the question is c. a weak acid titrated with a strong base.