Omeprazole has a pKa value of 7.1. Is Omeprazole a weak acid or weak base? Circle...
Omeprazole has a pKa value of 7.1. Is Omeprazole a weak acid or
weak base? Circle the acidic or
basic functional group in the structure
2. Calculate the percentage of omeprazole in the neutral form
(non-ionized) in stomach (pH 1.5)
and small intestines (pH 6.5).
3. What would you expect the pKa value of the carboxylic acid
group in the derivatized
omeprazole? Is the derivatized omeprazole an acid, base or
something else?
4. Explain why the omeprazole derivative may have higher solubility
than the underived
omeprazole?
5. Discuss qualitatively the effect of buffer pH on the
solubility of the omeprazole derivative. At
what pH would you expect that the derivative has the lowest
solubility?
6. Penicillin has a pKa value of 2.75. Is penicillin a weak acid
or base? Circle the acidic or basic
functional group in the structure.
7. What type of degradation reactions would you expect that
penicillin may undergo in liquid
formulations? How would the solution pH affect the stability of
penicillin in aqueous solutions?
8. For penicillin and original omeprazole, what would be the
optimal pH for the oral solution
formulation considering both solubility and stability?
9. For penicillin and derivatized omeprazole, what would be the
optimal pH for the oral solution
formulation considering both solubility and stability?
Homework Answers
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Omeprazole has a pKa value of 7.1. Is Omeprazole a weak acid or
weak base? Circle...
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Consider a weak base that has a pKb of 4.2. • What is the pKa of...
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1) Use the Acid-Base table to determine the pKa of the weak acid HCN. 2) What...
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I need to know the % output when : weak acid( pKa=6) is in pH of urine at 6 and pH or urine at 8. Also the weak base (pKa 7) in pH of urine at 6 and pH or urine at 8. Effect of urine pH on deliv...
I need to know the % output when :
weak acid( pKa=6) is in pH of urine at 6 and pH or urine at
8.
Also the weak base (pKa 7) in pH of urine at 6 and pH or urine
at 8.
Effect of urine pH on delivery route: Weak organic acids and bases can reach the luminal fluid (the filtrate, the primary urine) either by glomerular filtration in Bowman's capsule or by secretion in the proximal tubule. In...
please thoroughly explain Benzocaine pka = → H+ + Cephalexin NH pka = What is the...
please thoroughly explain
Benzocaine pka = → H+ + Cephalexin NH pka = What is the most dominant species at pH 7.4? H+ + → For each: Give the functional group name, hybridization and acidity (Acidic, Basic or Neutral) of the circled atoms Give the most likely basic form in water •Estimate the pka of circled atoms •Which one is the stronger acid (blue circle) 118
Biochemistry 4. The ionization of p-nitrophenol is shown below (pKa = 7.0): NO2 он weak acid...
Biochemistry
4. The ionization of p-nitrophenol is shown below (pKa = 7.0): NO2 он weak acid conjugate base a. (4 points) Identify the weak acid and conjugate base. b. (4 points)At pH 7, what are the relative concentrations of ionized and un-ionized p- nitrophenol? c. (4 points)If enough concentrated hydrochloric acid is added to a solution of p-nitrophenol to lower the pH from 7 to 5, what will happen to the relative concentrations of the ionized and un-ionized forms? d....
For the titration of a weak acid with a strong base what is the pKa of...
For the titration of a weak acid with a strong base what is the pKa of the weak acid if the pH is 6.72 at the equilvalence point (100% T), 9.12 at the end point, and 3.3 at 50% T? Please answer with one sig fig.
Please answer these question: _ An aqueous solution of a weak acid, HWk (pKa=5.25), has a...
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If the anion in an insoluble salt is a conjugate base of a weak acid, will...
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A weak acid is titrated with a strong base and the pH vs. volume plot is...
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I need to know the % output when :
weak acid( pKa=6) is in pH of urine at 6 and pH or urine at
8.
Also the weak base (pKa 7) in pH of urine at 6 and pH or urine
at 8.
Effect of urine pH on delivery route: Weak organic acids and bases can reach the luminal fluid (the filtrate, the primary urine) either by glomerular filtration in Bowman's capsule or by secretion in the proximal tubule. In...
please thoroughly explain
Benzocaine pka = → H+ + Cephalexin NH pka = What is the most dominant species at pH 7.4? H+ + → For each: Give the functional group name, hybridization and acidity (Acidic, Basic or Neutral) of the circled atoms Give the most likely basic form in water •Estimate the pka of circled atoms •Which one is the stronger acid (blue circle) 118
Biochemistry
4. The ionization of p-nitrophenol is shown below (pKa = 7.0): NO2 он weak acid conjugate base a. (4 points) Identify the weak acid and conjugate base. b. (4 points)At pH 7, what are the relative concentrations of ionized and un-ionized p- nitrophenol? c. (4 points)If enough concentrated hydrochloric acid is added to a solution of p-nitrophenol to lower the pH from 7 to 5, what will happen to the relative concentrations of the ionized and un-ionized forms? d....
A weak acid is titrated with a strong base and the pH vs. volume plot is shown. Approximately what is denoted with B)? A) The equilibrium of the acid B) The starting pH C) The equivalence point D) The end point E) The pKa of the weak acid D) pH B) A) Volume titrant added O E OB OA Ос OD о Bi E A weak acid is titrated with a strong base and the pH vs. volume plot is...
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