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Experiment 1: Preparation and pH of Buffer Solutions Test Data:     Mass of Sodium Acetate :4.0 g    Volume of Sodium Acetate Solution: 100.00mL   Acetic Acid Concentration (mass percent from label) :4.5%   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 /Results *Show all work with units.  The answers must have the correct units and the correct number of significant figures   Sodium acetate moles 0.049 mol (molar mass = 82.0 g/mol)   Molarity of sodium acetate = 0.49 M   Concentration of acetic acid (from bottle) =4.5 %         Molarity of acetic acid = 0.75 M                        (molar mass = 60.0 g/mol; density of the solution is 1.0 g/mL)   Work:     pH (calculated and theoretical) of prepared buffer solutions Show all work with units   The answers must have the correct units and the correct number of significant

Experiment 1: Preparation and pH of Buffer Solutions Test Data:     Mass of Sodium Acetate :4.0 g    Volume of Sodium Acetate Solution: 100.00mL   Acetic Acid Concentration (mass percent from label) :4.5%   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 /Results *Show all work with units.  The answers must have the correct units and the correct number of significant figures   Sodium acetate moles 0.049 mol (molar mass = 82.0 g/mol)   Molarity of sodium acetate = 0.49 M   Concentration of acetic acid (from bottle) =4.5 %         Molarity of acetic acid = 0.75 M                        (molar mass = 60.0 g/mol; density of the solution is 1.0 g/mL)   Work:     pH (calculated and theoretical) of prepared buffer solutions Show all work with units   The answers must have the correct units and the correct number of significant

Chemistry
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

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

/Results

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

 

  1. Sodium acetate moles 0.049 mol

(molar mass = 82.0 g/mol)

 

  1. Molarity of sodium acetate = 0.49 M

 

  1. Concentration of acetic acid (from bottle) =4.5 %

       

  1. Molarity of acetic acid = 0.75 M

                       (molar mass = 60.0 g/mol; density of the solution is 1.0 g/mL)

 

Work:

 

 

  1. pH (calculated and theoretical) of prepared buffer solutions

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

Caicuiated pH Buffer Acetic Acid; Sodium Acetate Recorded Solution Molarity* Molarity* pH A B D E *Concentration in the buffer solution Ka (acetic acid) = 1.8 x 105
Transcribed Image Text:Caicuiated pH Buffer Acetic Acid; Sodium Acetate Recorded Solution Molarity* Molarity* pH A B D E *Concentration in the buffer solution Ka (acetic acid) = 1.8 x 105
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