d. During the fermentation of wine, a buffer system consisting of tartaric acid and potassium hydrogen tartrate is created as the result of a biochemical reaction. Assuming that at some point in the process, the concentrations of the two components are approximately equal, determine the pH of the wine. The pKa of tartaric acid is 2.96.

d. During the fermentation of wine, a buffer system consisting of tartaric acid and potassium hydrogen tartrate is created as the result of a biochemical reaction. Assuming that at some point in the process, the concentrations of the two components are approximately equal, determine the pH of the wine. The pKa of tartaric acid is 2.96.

Chemistry: The Molecular Science

5th Edition

ISBN:9781285199047

Author:John W. Moore, Conrad L. Stanitski

Publisher:John W. Moore, Conrad L. Stanitski

Chapter19: The Chemistry Of The Main-group Elements

Section: Chapter Questions

Problem 88QRT

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Apatite, Ca5(PO4)3OH, is the mineral in teeth. On a chemical basis explain why drinking milk strengthens young children’s teeth. Sour milk contains lactic acid. Not removing sour milk from the teeth of young children can lead to tooth decay. Use chemical principles to explain why.
Weak base B has a pKb of 6.78 and weak acid HA has a pKa of 5.12. a Which is the stronger base, B or A? b Which is the stronger acid, HA or BH+? c Consider the following reaction: B(aq)+HA(aq)BH+(aq)+A(aq) Based on the information about the acid/base strengths for the species in this reaction, is this reaction favored to proceed more to the right or more to the left? Why? d An aqueous solution is made in which the concentration of weak base B is one half the concentration of its acidic salt, BHCl, where BH+ is the conjugate weak add of B. Calculate the pH of the solution. e An aqueous solution is made in which the concentration of weak acid HA twice the concentration of the sodium salt of the weak acid, NaA. Calculate the pH of the solution. f Assume the conjugate pairs B/BH+ and HA/A are capable of being used as color-based end point indicators in acidbase titrations, where B is the base form indicator and BH is the acid form indicator, and HA is the acid form indicator and A is the base form indicator. Select the indicator pair that would be best to use in each of the following titrations: (1) Titration of a strong acid with a strong base. (i) B/BH+ (ii) HA/A (2) Titration of a weak base with a strong acid. (i) B/BH+ (ii) HA/A
During the fermentation of wine, a buffer system consisting of tartaric acid and potassium hydrogen tartrate is produced by a biochemical reaction. Assuming that at some time the concentration of potassium hydrogen tartrate is twice that of tartaric acid, calculate the pH of the wine. The pKa of tartaric acid is 2.96.
What will be the pH of a buffer solution containing an acid with a pKa of 5.4 with an acid concentration equivalent to that of its conjugate base?
What is the pH of a 0.15 M solution of sodium nitrite? The pKa of nitrous acid is 3.15.
A 0.040 M NaCH3CO2 aqueous solution is mixed with a 0.080 M CH3COOH aqueous solution, where the pKa of CH3COOH is equal to 4.75. What is the pH of the resulting solution?
What is the equilibrium constant value for NaC2H3O2 and how do you find its Kb?
The first step in the preparation of magnesium metal is the precipitation of Mg(OH)2 from sea water by the addition of Ca(OH)2. The concentration of Mg2+(aq) in sea water is 5.37 × 10–2 M. Calculate the pH at which [Mg2+] is diminished to 1.0 × 10–5 M by the addition of Ca(OH)2.
The primary buffer in the blood is carbonate-bicarbonate buffer. If the pKa is 6.1 and the pH is set at 7.4, what is the ratio of the concentrations of carbonate to bicarbonate. Describe the buffering capacity of this buffer.
Using the concentrations 0.100M and 0.1766M, and the pKa of 3.752, what is the theoretical pH of a buffer solution?
If equal volumes of 0.29 M acetic acid and 0.12 M sodium hydroxide are mixed, what is the pH of the resulting solution? The pka of acetic acid is 4.75
What are the pKa values and buffering capacity of these following buffer components? Ammonium/Ammonia buffer Lactic acid/Lactate buffer Phosphoric acid/hydrogen PO4 buffer Benzoic acid/Benzoate buffer

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