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indicator is best suited for the analyte?

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter10: Potentiometry And Redox Titrations

Section: Chapter Questions

Problem 8P

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Question

The titration of an unknown weak acid with 0.10M NaOH is carried out and the pH at the equivalence point was found to be 8.50. Which indicator is best suited for the analyte? pKa=4.2

a. phenolphthalein pKa=9.7

b. methyl red pKa=5.0

c. methyl orange pKa=4.2

d. cresol purple pKa=8.3

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