pH (calculated and theoretical) of prepared buffer solutions Show all work .  The answers must have the correct units and the correct number of significant figures

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Experiment 1: Preparation and pH of Buffer Solutions

  1. Test Data: 

  

  1. Mass of Sodium Acetate :4.0 g 

 

  1. Volume of Sodium Acetate Solution: 100.00mL

 

  1. Acetic Acid Concentration (mass percent from label) :4.5%

 

  1. pH of Prepared Buffer Solutions

 

Buffer Solution


Acetic Acid; 4.5%

Sodium Acetate Solution


Recorded pH


A


5.0 mL


5.0 mL

4.3


B


5.0 mL


1.0 mL

4.2


C


10.0 mL


1.0 mL

3.4


D


1.0 mL


10.0 mL

5.0


E


1.0 mL


5.0 mL

4.5

question

 

1. 

pH (calculated and theoretical) of prepared buffer solutions

Show all work .  The answers must have the correct units and the correct number of significant figures

 

Buffer Solution

Acetic Acid; Molarity*

Sodium Acetate Molarity*

Recorded pH

Calculated

pH


A

       

B

       

C

       

D

       

E

       

 

*Concentration in the buffer solution

Ka (acetic acid) = 1.8 x 10-5

 

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