# Problem: 18.0 mL of 0.126 M diprotic acid (H 2A) was titrated with 0.1021 M KOH. The acid ionization constants for the acid are Ka1 = 5.2 x 10 -5 and Ka2 = 3.4 x 10 -10.a. At what added volume of base does the first equivalence point occur?b. At what added volume of base does the second equivalence point occur?

###### Problem Details

18.0 mL of 0.126 M diprotic acid (H 2A) was titrated with 0.1021 M KOH. The acid ionization constants for the acid are Ka1 = 5.2 x 10 -5 and Ka2 = 3.4 x 10 -10.

a. At what added volume of base does the first equivalence point occur?

b. At what added volume of base does the second equivalence point occur?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Equivalence Point concept. If you need more Equivalence Point practice, you can also practice Equivalence Point practice problems.

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Based on our data, we think this problem is relevant for Professor Kijewska & Pollock's class at MSU.