In the preparation of the benzoic acid ( pKa 4.2) and in order to precipitate all of the benzoic acid from it sodium benzoate salt in an aqueous solution, students are advised to bring the pH of the solution to less than pH 2 by adding concentrate HCl to the benzoate salt. The following equilibrium shows dissociation of benzoic acid in the aqueous solution. Calculate and explain why pH less than 2 has been suggested. (Hint: First calculate the pH of the benzoic solution at equilibrium) 10. OH

In the preparation of the benzoic acid ( pKa 4.2) and in order to precipitate all of the benzoic acid from it sodium benzoate salt in an aqueous solution, students are advised to bring the pH of the solution to less than pH 2 by adding concentrate HCl to the benzoate salt. The following equilibrium shows dissociation of benzoic acid in the aqueous solution. Calculate and explain why pH less than 2 has been suggested. (Hint: First calculate the pH of the benzoic solution at equilibrium) 10. OH

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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