9. Phenolphthalein, a colorless weak acid (K₂= 6.31 x 10-10) which dissociates in water forming pink anions is widely considered a suitable indicator for this titration. Along with a suitable calculation, find the working/useful range of this indicator to explain its use. 10. When 100.0mL of 0.10 M malonic acid (H₂CH₂C₂O4) is titrated with 0.10M NaOH the following titration curve is observed: pH 12- 10 8 9 47 N D 50 100 200 150 vol. of NaOH added (mL) a. Given the titration curve above, is Malonic acid a mono-, di- or triprotic acid? Explain your answer. b. How many bu er regions and equivalence points are present? Indicate each with A-E. C. Write out the reactions and the equilibrium expressions associated with Ka1 and Kaz.

9. Phenolphthalein, a colorless weak acid (K₂= 6.31 x 10-10) which dissociates in water forming pink anions is widely considered a suitable indicator for this titration. Along with a suitable calculation, find the working/useful range of this indicator to explain its use. 10. When 100.0mL of 0.10 M malonic acid (H₂CH₂C₂O4) is titrated with 0.10M NaOH the following titration curve is observed: pH 12- 10 8 9 47 N D 50 100 200 150 vol. of NaOH added (mL) a. Given the titration curve above, is Malonic acid a mono-, di- or triprotic acid? Explain your answer. b. How many bu er regions and equivalence points are present? Indicate each with A-E. C. Write out the reactions and the equilibrium expressions associated with Ka1 and Kaz.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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