An acid with pKa of 6 is placed into an environment where the PH is 2....
An acid with pKa of 6 is placed into an environment where the PH is 2. Therefore, you can safely conclude that most of the acid molecules are
| a. |
Adducted |
|
| b. |
Ionized |
|
| c. |
Nonionized |
|
| d. |
Free radicals |
Homework Answers
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An acid with pKa of 6 is placed into an environment where the PH
is 2....
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...
Hydroselenic acid, H2Se, is a diprotic acid with pKa,1 = 3.89 and pKa,2 = 11.01 at...
Hydroselenic acid, H2Se, is a diprotic acid with pKa,1 = 3.89 and pKa,2 = 11.01 at 25 °C. For 0.147 mol L−1 H2Se(aq) at 25 °C, calculate: (a) the fraction, α1, of H2Se that exists in the singly-ionized form, HSe− α1 = (Enter a number between 0 and 1, accurate to 2 significant figures.) (b) the equilibrium concentration of the doubly-ionized form, Se2− [Se2− ]eq = mol L−1 (Enter a number accurate to 2 significant figures.) (c)...
Question 6: (1 point) Selenous acid, H2SO3, is a diprotic acid with pKa,1 = 2.64 and...
Question 6: (1 point) Selenous acid, H2SO3, is a diprotic acid with pKa,1 = 2.64 and pKa,2 = 8.26 at 25 °C. For 0.169 mol L-1 H2SeO3(aq) at 25 °C, calculate: (a) the fraction, at, of H2SeO3 that exists in the singly-ionized form, HSEO3- ay = (Enter a number between 0 and 1, accurate to 2 significant figures.) (b) the equilibrium concentration of the doubly-ionized form, Se032- [SeO32-leq = _ (Enter a number accurate to 2 significant figures.) mol L-1...
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....
please do all parts. thank you so much asap Which drug would be most readily absorbed...
please do all parts. thank you so much
asap
Which drug would be most readily absorbed from the stomach (pH 2.0)? A. Weak acid, pKa 2.0 B. Weak acid, pKa 3.5 C. Weak base, pKa 3.5 D. Weak base, pKa 9.0 Fill in the ratio of ionized to non-ionized forms for a weak acid drug given the listed differences between pH and pKa: PH-pКа-2 pH-pKa-1 pH-pKa 2 PH-pka 1 pH-pKa lonized Non-ionized than its pKa - If your drug is...
The conjugate acid of ethanol amine (HOCH2CH2NH3+) has pKa = 9.50. What can you conclude about...
The conjugate acid of ethanol amine (HOCH2CH2NH3+) has pKa = 9.50. What can you conclude about a solution of this amine in which [RNH3+)] = 10 x [RNH2]?) Question 9 options: a) pH = 10.50 b) pH = 9.50 c) pH = 8.50 d) None of the above.
Which of the following compounds would make the best buffer at pH 7.5? Acetic acid, pKa=...
Which of the following compounds would make the best buffer at pH 7.5? Acetic acid, pKa= 4.76 N-tris(hydroxymethyl) methylglycine (Tricine), pKa = 8.15 N-2-hydroxyethylpiperazine-N’-ethansulfonic acid, pKa2= 7.6 Glycine, pKa2= 9.9 Tris(hydroxymethyl)aminomethane (Tris), pKa = 8.3 I believe 3 is the correct answer and therefore I am trying to answer the below question with this information. Using the answer that you selected from question 1 above: a. Explain how you would make the buffer starting with 1M HA and 1M A-...
PART A. Determine the pH of a 9.553 mM weak acid solution that has a pKa...
PART A. Determine the pH of a 9.553 mM weak acid solution that has a pKa of 8.83 PART B. Calculate the pH of a 319 mM weak base solution with a pKb of 9.04. PART C. Determine the pKa of a weak acid solution that has an initial concentration of 0.334 M and a pH of 4.54. Hint: You know the pH of the solution, so you can easily determine x in your ICE table PART D. Calculate the...
Question 2 2/2 pts If the pka of HCHO2 is 3.74 and the pH of an...
Question 2 2/2 pts If the pka of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89, which of the following is TRUE? It is not possible to make a buffer of this pH from HCHO2 and NaCHO2. [HCHO2] = [NaCHO2] [HCHO2] >>[NaCHO2] [HCHO2] < [NaCHO2] [HCHO2] > [NaCHO2] Question 3 1.33/2 pts Acid #1 has a pka of 3.15 Acid #2 has a pka of 3.65 Acid #3 has a pka of 4.23 Acid #4 has...
Given stocks of 1 M Lactic Acid (pKa 3.86) at pH 3.5, 2 M naOH, 2...
Given stocks of 1 M Lactic Acid (pKa 3.86) at pH 3.5, 2 M naOH, 2 M HCl and water: how would you prepare 4 liters of 0.05 M Lactic Acid at pH 3.25? Give 2 M Tris, pH 7.1 (pKa 8.0), 5 M NaOH, 5 M HCl, and water: how would you prepare 2 L of 0.2 M Tris, pH 7.4?
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...
Question 6: (1 point) Selenous acid, H2SO3, is a diprotic acid with pKa,1 = 2.64 and pKa,2 = 8.26 at 25 °C. For 0.169 mol L-1 H2SeO3(aq) at 25 °C, calculate: (a) the fraction, at, of H2SeO3 that exists in the singly-ionized form, HSEO3- ay = (Enter a number between 0 and 1, accurate to 2 significant figures.) (b) the equilibrium concentration of the doubly-ionized form, Se032- [SeO32-leq = _ (Enter a number accurate to 2 significant figures.) mol L-1...
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....
please do all parts. thank you so much
asap
Which drug would be most readily absorbed from the stomach (pH 2.0)? A. Weak acid, pKa 2.0 B. Weak acid, pKa 3.5 C. Weak base, pKa 3.5 D. Weak base, pKa 9.0 Fill in the ratio of ionized to non-ionized forms for a weak acid drug given the listed differences between pH and pKa: PH-pКа-2 pH-pKa-1 pH-pKa 2 PH-pka 1 pH-pKa lonized Non-ionized than its pKa - If your drug is...
Question 2 2/2 pts If the pka of HCHO2 is 3.74 and the pH of an HCHO2/NaCHO2 solution is 3.89, which of the following is TRUE? It is not possible to make a buffer of this pH from HCHO2 and NaCHO2. [HCHO2] = [NaCHO2] [HCHO2] >>[NaCHO2] [HCHO2] < [NaCHO2] [HCHO2] > [NaCHO2] Question 3 1.33/2 pts Acid #1 has a pka of 3.15 Acid #2 has a pka of 3.65 Acid #3 has a pka of 4.23 Acid #4 has...
Given stocks of 1 M Lactic Acid (pKa 3.86) at pH 3.5, 2 M naOH, 2 M HCl and water: how would you prepare 4 liters of 0.05 M Lactic Acid at pH 3.25? Give 2 M Tris, pH 7.1 (pKa 8.0), 5 M NaOH, 5 M HCl, and water: how would you prepare 2 L of 0.2 M Tris, pH 7.4?
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