![11. If a weak acid has a pK of 5, what is the ratio of [base]/[acid] at pH 5? 12. If a weak acid has a pK of 5, what is the ratio of [base|/[acid] at pH 4? 13. If a weak acid has a pK of 5, what is the ratio of [base]/[acid] at pH 6? 14. If a weak acid has a pK of 4 what the pH when the ratio of [base]/[acid] is 4? 15. If a weak acid has a pK of 4 what the pH when the ratio of [base]/[acid] is 5?](http://img.homeworklib.com/questions/3d733f20-b8c9-11ea-8296-4b0d1f176512.png?x-oss-process=image/resize,w_560)
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11. If a weak acid has a pK of 5, what is the ratio of [base]/[acid]...
([conjugate base). pH=pK,+log (weak acido A weak acid has pk - 5.10. A student mixes 0.0300...
([conjugate base). pH=pK,+log (weak acido A weak acid has pk - 5.10. A student mixes 0.0300 mole of this weak acid with 0.0200 mole of its conjugate base. She then adds 0.0100 mole of H to this buffer. What is the pH (Enter the pH to 2 decimal places) after adding the H? Answer: -0.88
pH What is the approximate pK, for the weak acid. 14T (d) Excess hydroxide ion 12-...
pH What is the approximate pK, for the weak acid. 14T (d) Excess hydroxide ion 12- 10 (c) Equivalence point 8 6- (b) Buffer region 4 2 (a) Weak acid 0+ 0 2 4 6 8 10 12 14 16 Volume of NaOH (mL) Titration curve for the titration of a weak acid with a strong base. Answer:
please answer number 5 and 6 5. The buffer range for a given weak acid/conjugate base pair is pK, 11. Explain why. 6...
please answer number 5 and 6
5. The buffer range for a given weak acid/conjugate base pair is pK, 11. Explain why. 6. A weak triprotic acid, HZZ has the following K, values: Ki = 1.4 x 104 K = 9.7 x 10-7 K 5.3 x 109 a. Write the NIE associated with each Ka value. b. Of the four weak acid species: H.Z, H,Z, HZz"; which two could be used to prepare a buffer of pH = 3.55? Explain....
What is the approximate pk, for the weak acid. (d) Excess hydroxide ion (c) Equivalence point...
What is the approximate pk, for the weak acid. (d) Excess hydroxide ion (c) Equivalence point pH (b) Buffer region ta) Weak acid a) Weak acid 12 14 1 8 10 Volume of NaOH (ml.) Titration curve for the titration of a weak acid with a strong base.
Question: In the figure below, titration curves for strong acid with strong base and weak acid...
Question: In the figure below, titration curves for strong acid
with strong base and weak acid with strong base are shown. Compare
the shapes of these curves early in the titration for three
different cases: titration of a strong acid, titration of a weak
acid with a lower pKa, and titration of a weak acid with a higher
pKa. Discuss with the class why the titration curve for weak acids
increase more rapidly early in the titration than do stronger...
1oo ml. to the pA, iation curve for a weak acid being titrated with a strong base is pll equal to the pk, of base is The r-axis scale goes from 0.0 ml to 20.0 ml. The sharp rise is at the acid? T...
1oo ml. to the pA, iation curve for a weak acid being titrated with a strong base is pll equal to the pk, of base is The r-axis scale goes from 0.0 ml to 20.0 ml. The sharp rise is at the acid? The r-axis 24, At what point in the following titratí 20 a. 0.0 mL b.5.0 mL c. 9.0 ml d. 10.0 mL e. 18.0 ml 25. Acid-base indicators change color a. exactly when pH-pK, of the always...
Design a buffer that has a pH of 4.36 using one of the weak base/conjugate acid...
Design a buffer that has a pH of 4.36 using one of the weak base/conjugate acid systems shown below. Weak Base Conjugate Acid pk, CH3NH2 C6H1503N C3H5N 4.2x10-4 CH3NH3" 5.9x10-7 C6H1503NH 1.5x10-9 C;H3NH 2.4*10-11 1.7x10-8 6.7x10-6 10.62 7.77 5.17 How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide salt of...
Design a buffer that has a pH of 11.20 using one of the weak base/conjugate acid...
Design a buffer that has a pH of 11.20 using one of the weak base/conjugate acid systems shown below K Къ к, pK Weak Base Conjugate Acid 4.2x104 CH3NH3 CH3NH2 2.4x10-11 10.62 C6H1503N5.9x10-7 CH1503NH 1.7x10-8 7.77 CsHsN 1.5x109 CH5NH 6.7x10-6 5.17 How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide...
A weak acid, HA, has a pK, of 4.618. If a solution of this acid has...
A weak acid, HA, has a pK, of 4.618. If a solution of this acid has a pH of 4.253, what percentage of the acid is not ionized? Assume all H+ in the solution came from the ionization of HA percentage not ionized The Kb for an amine is 1.449 × 10-5 what percentage of the amine is protonated if the pH of a solution of the amine is 9.569? Assume that all OH came from the reaction of B...
Major Question 3 4 pts What is the approximate pK, of the weak acid being titrated?...
Major Question 3 4 pts What is the approximate pK, of the weak acid being titrated? pH 14 equivalence point 25 volume of all added on A) 2.6 B) 4.8 C) 9.2 D) 13 Ос OB OA 4 pts Question 4
([conjugate base). pH=pK,+log (weak acido A weak acid has pk - 5.10. A student mixes 0.0300 mole of this weak acid with 0.0200 mole of its conjugate base. She then adds 0.0100 mole of H to this buffer. What is the pH (Enter the pH to 2 decimal places) after adding the H? Answer: -0.88
pH What is the approximate pK, for the weak acid. 14T (d) Excess hydroxide ion 12- 10 (c) Equivalence point 8 6- (b) Buffer region 4 2 (a) Weak acid 0+ 0 2 4 6 8 10 12 14 16 Volume of NaOH (mL) Titration curve for the titration of a weak acid with a strong base. Answer:
please answer number 5 and 6
5. The buffer range for a given weak acid/conjugate base pair is pK, 11. Explain why. 6. A weak triprotic acid, HZZ has the following K, values: Ki = 1.4 x 104 K = 9.7 x 10-7 K 5.3 x 109 a. Write the NIE associated with each Ka value. b. Of the four weak acid species: H.Z, H,Z, HZz"; which two could be used to prepare a buffer of pH = 3.55? Explain....
What is the approximate pk, for the weak acid. (d) Excess hydroxide ion (c) Equivalence point pH (b) Buffer region ta) Weak acid a) Weak acid 12 14 1 8 10 Volume of NaOH (ml.) Titration curve for the titration of a weak acid with a strong base.
Question: In the figure below, titration curves for strong acid
with strong base and weak acid with strong base are shown. Compare
the shapes of these curves early in the titration for three
different cases: titration of a strong acid, titration of a weak
acid with a lower pKa, and titration of a weak acid with a higher
pKa. Discuss with the class why the titration curve for weak acids
increase more rapidly early in the titration than do stronger...
1oo ml. to the pA, iation curve for a weak acid being titrated with a strong base is pll equal to the pk, of base is The r-axis scale goes from 0.0 ml to 20.0 ml. The sharp rise is at the acid? The r-axis 24, At what point in the following titratí 20 a. 0.0 mL b.5.0 mL c. 9.0 ml d. 10.0 mL e. 18.0 ml 25. Acid-base indicators change color a. exactly when pH-pK, of the always...
Design a buffer that has a pH of 4.36 using one of the weak base/conjugate acid systems shown below. Weak Base Conjugate Acid pk, CH3NH2 C6H1503N C3H5N 4.2x10-4 CH3NH3" 5.9x10-7 C6H1503NH 1.5x10-9 C;H3NH 2.4*10-11 1.7x10-8 6.7x10-6 10.62 7.77 5.17 How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide salt of...
Design a buffer that has a pH of 11.20 using one of the weak base/conjugate acid systems shown below K Къ к, pK Weak Base Conjugate Acid 4.2x104 CH3NH3 CH3NH2 2.4x10-11 10.62 C6H1503N5.9x10-7 CH1503NH 1.7x10-8 7.77 CsHsN 1.5x109 CH5NH 6.7x10-6 5.17 How many grams of the bromide salt of the conjugate acid must be combined with how many grams of the weak base, to produce 1.00 L of a buffer that is 1.00 M in the weak base? grams bromide...
A weak acid, HA, has a pK, of 4.618. If a solution of this acid has a pH of 4.253, what percentage of the acid is not ionized? Assume all H+ in the solution came from the ionization of HA percentage not ionized The Kb for an amine is 1.449 × 10-5 what percentage of the amine is protonated if the pH of a solution of the amine is 9.569? Assume that all OH came from the reaction of B...
Major Question 3 4 pts What is the approximate pK, of the weak acid being titrated? pH 14 equivalence point 25 volume of all added on A) 2.6 B) 4.8 C) 9.2 D) 13 Ос OB OA 4 pts Question 4
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