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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Ionic Equilibrium

Chemical equilibrium and ionic equilibrium are two major concepts in chemistry. Ionic equilibrium deals with the equilibrium involved in an ionization process while chemical equilibrium deals with the equilibrium during a chemical change. Ionic equilibrium is established between the ions and unionized species in a system. Understanding the concept of ionic equilibrium is very important to answer the questions related to certain chemical reactions in chemistry.

Arrhenius Acid

Arrhenius acid act as a good electrolyte as it dissociates to its respective ions in the aqueous solutions. Keeping it similar to the general acid properties, Arrhenius acid also neutralizes bases and turns litmus paper into red.

Bronsted Lowry Base In Inorganic Chemistry

Bronsted-Lowry base in inorganic chemistry is any chemical substance that can accept a proton from the other chemical substance it is reacting with.

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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