Exhibit 16-1 The following question(s) refer to the same titration: a 50.00 mL sample of 0.0950 M acetic acid (K_a = 1.8 × 10^-5) is being titrated with 0.106 M NaOH.
Refer to Exhibit 16-1. What is the pH at the equivalence point of the titration?

Question

Quizplus · Accepted Answer

At the equivalence point of a titration between a weak acid and a strong base, the solution contains the conjugate base of the weak acid (in this case, acetate ion). The pH is determined by the hydrolysis of the acetate ion, which makes the solution basic. Therefore, the pH will be greater than 7. The exact pH can be calculated using the Kb of the acetate ion and the concentration of the acetate ion at the equivalence point, but without doing the calculation, knowing the nature of the reaction and the products is enough to conclude that the pH will be basic, making option C the correct choice.

Exhibit 16-1 the Following Question(s) Refer to the Same Titration