a) Calculate the pH of a buffer system made up of 0.25 M C6H5COOH and 0.35 M C6H5C00ONA. b)What is the pH after the addition of 20 mL of 0.I M HCI to 500 ml of the above buffer solution? c)Describe how you would prepare a IL solution of 0.I M sodium acetate (CH3CO0Na)/0.I M acetic acid (CH3C0OH) buffer system with a pH of about 5.
a) Calculate the pH of a buffer system made up of 0.25 M C6H5COOH and 0.35 M C6H5C00ONA. b)What is the pH after the addition of 20 mL of 0.I M HCI to 500 ml of the above buffer solution? c)Describe how you would prepare a IL solution of 0.I M sodium acetate (CH3CO0Na)/0.I M acetic acid (CH3C0OH) buffer system with a pH of about 5.
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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the volume of HCL and acetic acid is 250 mL
Transcribed Image Text:Solution A: 1.7 x 10-5 M HCI
Solution B: 3.40 8 of CH3C0ONa.3H20 in 250 mL of 0.1 M
CH3COOH (Buffer solution) 0.IM NaOH and methyl red indicator
pH
solution
steps
obseration
Solution A Addition of a few drops the colour changes from clear to pink 4.68
of methylred
(HCL)
Addition of 10 drops of The colour change from clear to pink 4.73
0.1 M NAOH
Soluion B
Addition of a few drops The colour change from pink to clear
of methyl red
(buffer solution)
Addition of 10 drops of
The colour stays the same
4.73
0.1 M NaOH
a) Calculate the pH of a buffer system made up of 0.25 M
C6H5C0OH and 0.35 M C6H5COONa.
b)What is the pH after the addition of 20 mL of 0.I M HCI to 500
ml of the above buffer solution?
c)Describe how you would prepare a IL solution of 0.1 M sodium
acetate (CH3CO0Na)/0.I M acetic acid (CH3C0OH) buffer
system with a pH of about 5.
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