Titrating with 0.1 M NAOH we red 270 Buffer 1 Buffer 2 DI water 0.1 M acetic acid (mL) 10 35 0.5 M sodium acetate 2 7 (mL) Water (mL) Initial pH Final pH Buffer Concentration Initial Burette Reading Final Burette Reading Delivered Titrant (mL) 38 4-13 5-13 8..28 49-06 48-63 3819 E4-153 5-16 30 22 43-63 135ク 50 9•20 10-01 436 35-53 25-73 Ka of acetic acid= %3D Calculated theoretical pH of Buffer 1: Calculated theoretical pH of Buffer 2:

Titrating with 0.1 M NAOH we red 270 Buffer 1 Buffer 2 DI water 0.1 M acetic acid (mL) 10 35 0.5 M sodium acetate 2 7 (mL) Water (mL) Initial pH Final pH Buffer Concentration Initial Burette Reading Final Burette Reading Delivered Titrant (mL) 38 4-13 5-13 8..28 49-06 48-63 3819 E4-153 5-16 30 22 43-63 135ク 50 9•20 10-01 436 35-53 25-73 Ka of acetic acid= %3D Calculated theoretical pH of Buffer 1: Calculated theoretical pH of Buffer 2:

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter15: Additional Aqueous Equilibria

Section: Chapter Questions

Problem 34QRT

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Similar questions

A buffer is prepared by dissolving 0.062 mol of sodium fluoride in 127 mL of 0.0399 M hydrofluoric acid. Assume no volume change after NaF is added. Calculate the pH of this buffer.
Malonic acid (HO2CCH2CO2H) is a diprotic acid. In the titration of malonic acid w ith NaOH, stoichiometric points occur at pH = 3.9 and 8.8. A 25.00-mL sample of malonic acid of unknown concentration is titrated with 0.0984 M NaOH, requiring 31.50 mL of the NaOH solution to reach the phenolphthalein end point. Calculate the concentration of the initial malonic acid solution. (Sec Exercise 113.)
A buffer is composed of formic acid and its conjugate base, the formate ion. (a) What is the pH of a solution that has a formic acid concentration of 0.050 M and a sodium formate concentration of 0.035 M? (b) What must the ratio of acid to conjugate base be to have a pH value 0.50 units higher than the value calculated in part (a)?
A buffer is prepared using the butyric acid/butyrate (HC4H7O2/C4H7O2)acid-base pair. The ratio of acid to base is 2.2 and Ka for butyric acid is1.54105. (a) What is the pH of this buffer? (b) Enough strong base is added to convert 15% of butyric acid to the butyrate ion. What is the pH of the resulting solution? (c) Strong acid is added to the buffer to increase its pH. What must the acid/base ratio be so that the pH increases by exactly one unit (e.g., from 2 to 3) from the answer in (a)?