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1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33 1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33

1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33 1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33

Chemistry & Chemical Reactivity
Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter17: Principles Of Chemical Reactivity: Other Aspects Of Aqueous Equilibria
Section: Chapter Questions
Problem 15PS: A buffer is composed of formic acid and its conjugate base, the formate ion. (a) What is the pH of a...
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1. A buffer was prepared by mixing 150mL of a 0.30M glucolic acid solution and 350mL of a 0.45M potassium gluconate solution. Assuming a final volume of 500mL, A. What are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? B. What is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750mL of 0.50M bicarbonate buffer pH 9.75 using A. NaHCO3 (MM= 84g/mol) crystal and Na2CO3 (MM= 106g/mol) solid. B. 1M NaHCO3 and 1M Na2CO3 stock solutions. pKa values: pKa1= 6.35; pKa2= 10.33
1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33
Transcribed Image Text:1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33
1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33
Transcribed Image Text:1. A buffer was prepared by mixing 150 mL of a 0.30 M gluconic acid solution and 350 mL of a 0.45 M potassium gluconate solution. Assuming a final volume of 500 mL, a. what are the final concentrations of gluconic acid and potassium gluconate solutions after mixing? b. what is the pH of this buffer? The pKa for gluconic acid is 3.72. 2. Calculate the relative amounts (in grams or milliliters) of each buffer component needed to prepare 750 mL of 0.50 M bicarbonate buffer pH 9.75 using a. NaHCO3 (MM = 84 g/mol) crystal and Na2CO3 (MM = 106 g/mol) solid. b. 1M NaHCO3 and 1M Na2CO3 stock solutions. pka values: pKa1 = 6.35; pKa2 = 10.33
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