Lactobacillus bulgaricus is the main bacterium used in the production of yogurt and requires an acidic environment to grow effectively. To prepare an agar solution of this bacterium, a 100.0 mL 0.100 M buffer solution pH 5.00 must be prepared. The only available reagents in the laboratory are solid benzoic acid (HC6H5COO, MM = 122.12), solid sodium bicarbonate (NaHCO3, MM = 84.01), 1.00 M HCl, and 1.00 M NaOH. Acid dissociation constants: Benzoic acid, HC6H5COO: pKa,1 = 4.19 Carbonic acid, H2CO3: pKa,1 = 6.37, pKa,2 = 10.32 Identify the most appropriate conjugate acid-base pair for the target buffer. Determine the amounts of the acidic and basic species in the buffer (in millimoles).
Lactobacillus bulgaricus is the main bacterium used in the production of yogurt and requires an acidic environment to grow effectively. To prepare an agar solution of this bacterium, a 100.0 mL 0.100 M buffer solution pH 5.00 must be prepared. The only available reagents in the laboratory are solid benzoic acid (HC6H5COO, MM = 122.12), solid sodium bicarbonate (NaHCO3, MM = 84.01), 1.00 M HCl, and 1.00 M NaOH. Acid dissociation constants: Benzoic acid, HC6H5COO: pKa,1 = 4.19 Carbonic acid, H2CO3: pKa,1 = 6.37, pKa,2 = 10.32 Identify the most appropriate conjugate acid-base pair for the target buffer. Determine the amounts of the acidic and basic species in the buffer (in millimoles).
Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter15: Additional Aqueous Equilibria
Section: Chapter Questions
Problem 32QRT: The titration curves for two acids with the same base are shown on this graph. (a) Which is the...
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Lactobacillus bulgaricus is the main bacterium used in the production of yogurt and requires an acidic environment to grow effectively. To prepare an agar solution of this bacterium, a 100.0 mL 0.100 M buffer solution pH 5.00 must be prepared. The only available reagents in the laboratory are solid benzoic acid (HC6H5COO, MM = 122.12), solid sodium bicarbonate (NaHCO3, MM = 84.01), 1.00 M HCl, and 1.00 M NaOH.
Acid dissociation constants:
- Benzoic acid, HC6H5COO: pKa,1 = 4.19
- Carbonic acid, H2CO3: pKa,1 = 6.37, pKa,2 = 10.32
- Identify the most appropriate conjugate acid-base pair for the target buffer.
- Determine the amounts of the acidic and basic species in the buffer (in millimoles).
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