Consider Titrating a Triprotic Acid with Standard NaOH as Shown

question 1

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.

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