Homework Answers
Solution:
Indomethacin is a weak acid, it ionizes in water as,
C19H16ClNO4 + H2O = C19H15ClNO-4 + H3O+
>>Unionized form = C19H16ClNO4
>>Ionized form = C19H15ClNO4-
A) pH = 5.5
According to Hendersen-Hasselbalch equation,
pH = pKa + log [C19H15ClNO4-) ] / [C19H16ClNO4]
5.5 = 6.5 + log [Ionized] / [Unionized]
log [Ionized] / [Unionized] = -1.0
[Ionized] / [Unionized] = antilog (-1.0) = 0.10
[Ionized] / [Unionized] = 1/10
B) pH = 7.5
According to Hendersen-Hasselbalch equation,
pH = pKa + log [C19H15ClNO4-) ] / [C19H16ClNO4]
7.5 = 6.5 + log [Ionized] / [Unionized]
log [Ionized] / [Unionized] = 1.0
[Ionized] / [Unionized] = antilog 1.0 = 10
[Ionized] / [Unionized] = 10/1
Add Answer to:
please also thoroughly explain how to determine which one is
ionized and which one isnt. the...
Which of the following statements is true of weak acids dissolved in water: They...
Which of the following statements is true of weak acids dissolved in water: They are completely ionized in water They are totally unionized in water They are partially ionized in water The dissociation constant is a function of pH QUESTION 13 Which of the following is a hydroxide ion? H3O+ OH- HOOH CH3OH2+ QUESTION 14 The following molecule is an example of which class...
Can you please show math, formulas and explain. 1. If the pH of a solution is...
Can you please show math, formulas and explain. 1. If the pH of a solution is 7.5, what is the pOH? pH = - log[H+] [H+][OH-] = 1.0 x 10-14 M2 2. Given the Ka values for two acids, determine the pKas and which is a stronger acid. Ka1 = 1.38 × 10–7 Ka2 = 1.70 × 10–4 3. The pH of a sample of blood is 7.4, while gastric juice is pH 2.4. The blood sample has: A) one...
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-...
1. Determine the buffer zones on the graph. 2. Determine the volumes at the first two...
1. Determine the buffer zones on the graph.
2. Determine the volumes at the first two stoichiometric points
of the acid titration.
3. Determine the average volumes for the first two
stoichiometric points.
4. Use the average volume to obtain pKa 1 and pka 2 of the
acid.
5. From the pKa 1 and pKa 2, obtain the values of ka 1 and ka
2.
6. Determine the % of error according to your results for the
constant of dissociation...
4. What molar ratio of HPO4 2-to H2PO4-in solution would produce a pH of 7.0? Phosphoric...
4. What molar ratio of HPO4 2-to H2PO4-in solution would produce a pH of 7.0? Phosphoric acid (H3PO4), a triprotic acid, has 3 pKa values: 2.14, 6.86, and 12.4. Hint: Only one of the pKa values is relevant here. 5. For a weak acid with a pKaof 6.0, calculate the ratio of conjugate base to acid at a pH of 5.0. 6. Which of these compounds would be the best buffer at pH 5.0: formic acid (pKa 3.8), acetic acid...
6. How many mL of 0.2 M sodium acetate should be added to 200 mL of...
6. How many mL of 0.2 M sodium acetate should be added to 200 mL of 0.2 M acetic acid to make a buffer of pH 5.5? (refer to Table 2-2 on page 60 for pKa values). What is the molarity of the resulting buffer with respect to acetate (acetate + acetic acid)? 7. How many mL of 0.2 M HCl should be added to 50 mL of 0.2 M Tris base (Trishydroxymethyl aminomethane) to make a buffer of pH...
can someone please me with checking our work for the chart and helping me with the missing ones. Also with question 4 a...
can someone please me with checking our work for the chart and
helping me with the missing ones. Also with question 4 and 5? Thank
You
Concentration of standardized NaOH Volume of acid used NaOH volume added before largest pH increase NaOH volume added after largest pH increase pH before the largest pll increase pH after the largest pH increase I HC HC,H,O, 0.100 M 0.100 M 10.0 ml. 10 ml 10.2 ml. 8.6 ml. 112 ml 100 ml 5.495...
can you please explain how to determine which 2 ratios to select to test? also how...
can you please explain how to determine which 2 ratios to select
to test? also how do you determine the cross type from this info
when the question doesn't as, for the type of epistasis?
4. Use Chi-square to test which of 2 possible ratios is the most probable ratio of progeny kernels. Use this information to determine the cross type and parental genotype. Show your work here or on a separate sheet to receive full credit. Cross type does...
11. Which of these lists of molecules is arranged in order of increasing acid strength? H2S...
11. Which of these lists of molecules is arranged in order of increasing acid strength? H2S <H20 <H2Se 6. HS <H2Se <H20 H2O <H2S <H2Se d. H20 <HSe <H2S 8bl - Paral- 12. Which of the following would decrease the Ksp for Pb12? a. Lowering the pH of the solution b. Adding a solution of Pb(NO3)2 c. Adding a solution of KI d. None of a), b.), or c.). 13. A titration of an acid and base to the equivalence...
question 5, can you also explain it very thoroughly how you got the answer and the...
question 5, can you also explain it very thoroughly how you got the
answer and the steps to get the answer such as step 1, 2, 3 that
would be much appreicated thank you very much.
where ginal pro modifica multiplie why this would likely be followed by an equally sudden increase in actual investment in inventories. c. Illustrate the event from part (b) in a 45°-line diagram Consider the following diagram of the AE function and the 45° line....
1. Determine the buffer zones on the graph.
2. Determine the volumes at the first two stoichiometric points
of the acid titration.
3. Determine the average volumes for the first two
stoichiometric points.
4. Use the average volume to obtain pKa 1 and pka 2 of the
acid.
5. From the pKa 1 and pKa 2, obtain the values of ka 1 and ka
2.
6. Determine the % of error according to your results for the
constant of dissociation...
6. How many mL of 0.2 M sodium acetate should be added to 200 mL of 0.2 M acetic acid to make a buffer of pH 5.5? (refer to Table 2-2 on page 60 for pKa values). What is the molarity of the resulting buffer with respect to acetate (acetate + acetic acid)? 7. How many mL of 0.2 M HCl should be added to 50 mL of 0.2 M Tris base (Trishydroxymethyl aminomethane) to make a buffer of pH...
can someone please me with checking our work for the chart and
helping me with the missing ones. Also with question 4 and 5? Thank
You
Concentration of standardized NaOH Volume of acid used NaOH volume added before largest pH increase NaOH volume added after largest pH increase pH before the largest pll increase pH after the largest pH increase I HC HC,H,O, 0.100 M 0.100 M 10.0 ml. 10 ml 10.2 ml. 8.6 ml. 112 ml 100 ml 5.495...
can you please explain how to determine which 2 ratios to select
to test? also how do you determine the cross type from this info
when the question doesn't as, for the type of epistasis?
4. Use Chi-square to test which of 2 possible ratios is the most probable ratio of progeny kernels. Use this information to determine the cross type and parental genotype. Show your work here or on a separate sheet to receive full credit. Cross type does...
11. Which of these lists of molecules is arranged in order of increasing acid strength? H2S <H20 <H2Se 6. HS <H2Se <H20 H2O <H2S <H2Se d. H20 <HSe <H2S 8bl - Paral- 12. Which of the following would decrease the Ksp for Pb12? a. Lowering the pH of the solution b. Adding a solution of Pb(NO3)2 c. Adding a solution of KI d. None of a), b.), or c.). 13. A titration of an acid and base to the equivalence...
question 5, can you also explain it very thoroughly how you got the
answer and the steps to get the answer such as step 1, 2, 3 that
would be much appreicated thank you very much.
where ginal pro modifica multiplie why this would likely be followed by an equally sudden increase in actual investment in inventories. c. Illustrate the event from part (b) in a 45°-line diagram Consider the following diagram of the AE function and the 45° line....
Most questions answered within 3 hours.
-
Where is the error in this code sequence?
String s1 = "Hello";
String s2 = "ello";...
asked 10 months ago -
Financial data for Joel de Paris, Inc., for last year
follow:
Joel de Paris, Inc.
Balance...
asked 10 months ago -
Consider this reaction:
Al2(SO4)3 (aq)+ BaCl3
(aq) Al2Cl6 (aq)- +
3BaSO4(s) . What is the...
asked 10 months ago -
Suppose that Savneet is considering increasing her
recent random sample from 20 car rentals to 40...
asked 10 months ago -
Trucks arrive at an unloading terminal at an average rate of 120
per hour.
Trucks arrive...
asked 10 months ago -
Why are methanol and ethanol completely soluble in water while
octanol is not very little soluble....
asked 10 months ago -
A facilities manager at a university reads in a research report
that the mean amount of...
asked 10 months ago -
When the CuSO4 is rehydrated by adding water to the anhydrous
compound, is this an endothermic...
asked 10 months ago -
A ray of sunlight is passing from diamond into crown glass; the
angle of incidence is...
asked 10 months ago -
A block of mass 0.249 kg is placed on top of a light, vertical
spring of...
asked 10 months ago -
how do the kidneys compensate in the presences of acidosis
a) trigger hyperventilate
b) reserve acid...
asked 10 months ago -
Question 501 pts
The rental rate of capital to the firm increases. Which of the
following...
asked 10 months ago