a) The Ka value for phenolphthalein is 8 x 10-10. What is the concentration of hydrogen fon when this indicator changes colour? b) what is the pH at end paint? c) From your pH curve, why is the assumption that end point equals equivalence point valid for phenolphthalein?

a) The Ka value for phenolphthalein is 8 x 10-10. What is the concentration of hydrogen fon when this indicator changes colour? b) what is the pH at end paint? c) From your pH curve, why is the assumption that end point equals equivalence point valid for phenolphthalein?

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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Question

3 a) The Ka value for phenolphthalein is 8 x 10-10.
What is the concentration of hydrogen ton when this indicator
changes colour?
b) What is the pH at end paint?
c) From your pH curve, why is the assumption that end point equals
equivalence point valid for phenolphthalein?

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