Consider Titrating a Triprotic Acid with Standard NaOH as Shown

Multiple Choice

Consider titrating a triprotic acid with standard NaOH as shown in the titration curve below. What is the relationship between the first equivalence point and the third equivalence point in this titration curve?

A) The pH of the first equivalence point is three times larger than the pH found at the third equivalence point.
B) The pH of the first equivalence point is three times smaller than the pH found at the third equivalence point.
C) The volume of titrant required to reach the third equivalence point is three times as large as the volume of titrant required to reach the first equivalence point.
D) The volume of titrant required to reach the first equivalence point is three times as large as the volume of titrant required to reach the third equivalence point.
E) There are no relationships between the first and third equivalence points.