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3. You need to prepare 100 mL of a 0.200 M acetate buffer at pH 5.00. The pKa of acetic acid is 4.756 and the density of liquid acetic acid is 1.049 g/mL. You have pure liquid acetic acid (CH3CO2H; FW = 60.05 g/mol) and pure sodium acetate trihydrate (Na+CH3CO²- 3 H₂O; FW = 136.08 g/mol) available to you to prepare the buffer. a. Calculate the volume (in mL) of liquid acetic acid that must be added to the 100 mL volumetric flask. b. Calculate the mass (in grams) of sodium acetate that you would need to add to the 100 ml flask to prepare 100 mL of a pH 5.00 acetate buffer. c. If you only had the pure liquid acetic acid and 1.0 M NaOH available to you to prepare the buffer, what volume (in mL) of 1.0 M NaOH that must be added to what the volume (in mL) of liquid acetic acid to create the appropriate buffer?

3. You need to prepare 100 mL of a 0.200 M acetate buffer at pH 5.00. The pKa of acetic acid is 4.756 and the density of liquid acetic acid is 1.049 g/mL. You have pure liquid acetic acid (CH3CO2H; FW = 60.05 g/mol) and pure sodium acetate trihydrate (Na+CH3CO²- 3 H₂O; FW = 136.08 g/mol) available to you to prepare the buffer. a. Calculate the volume (in mL) of liquid acetic acid that must be added to the 100 mL volumetric flask. b. Calculate the mass (in grams) of sodium acetate that you would need to add to the 100 ml flask to prepare 100 mL of a pH 5.00 acetate buffer. c. If you only had the pure liquid acetic acid and 1.0 M NaOH available to you to prepare the buffer, what volume (in mL) of 1.0 M NaOH that must be added to what the volume (in mL) of liquid acetic acid to create the appropriate buffer?

Chemistry
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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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Biochemistry Chem 348 Slade Review Questions 3. You need to prepare 100 mL of a 0.200 M acetate buffer at pH 5.00. The pka of acetic acid is 4.756 and the density of liquid acetic acid is 1.049 g/mL. You have pure liquid acetic acid (CH3CO2H; FW = 60.05 g/mol) and pure sodium acetate trihydrate (Na+CH3CO²- 3 H₂O; FW = 136.08 g/mol) available to you to prepare the buffer. a. Calculate the volume (in mL) of liquid acetic acid that must be added to the 100 mL volumetric flask. b. Calculate the mass (in grams) of sodium acetate that you would need to add to the 100 mL flask to prepare 100 mL of a pH 5.00 acetate buffer. c. If you only had the pure liquid acetic acid and 1.0 M NaOH available to you to prepare the buffer, what volume (in mL) of 1.0 M NaOH that must be added to what the volume (in mL) of liquid acetic acid to create the appropriate buffer?
Transcribed Image Text:Biochemistry Chem 348 Slade Review Questions 3. You need to prepare 100 mL of a 0.200 M acetate buffer at pH 5.00. The pka of acetic acid is 4.756 and the density of liquid acetic acid is 1.049 g/mL. You have pure liquid acetic acid (CH3CO2H; FW = 60.05 g/mol) and pure sodium acetate trihydrate (Na+CH3CO²- 3 H₂O; FW = 136.08 g/mol) available to you to prepare the buffer. a. Calculate the volume (in mL) of liquid acetic acid that must be added to the 100 mL volumetric flask. b. Calculate the mass (in grams) of sodium acetate that you would need to add to the 100 mL flask to prepare 100 mL of a pH 5.00 acetate buffer. c. If you only had the pure liquid acetic acid and 1.0 M NaOH available to you to prepare the buffer, what volume (in mL) of 1.0 M NaOH that must be added to what the volume (in mL) of liquid acetic acid to create the appropriate buffer?
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