Citric acid (H3C6H5O7H3C6H5O7) has p?apKa values of 3.128 (p?a1pKa1), 4.761 (p?a2pKa2), and 6.396 (p?a3pKa3). What is...
Citric acid (H3C6H5O7H3C6H5O7) has p?apKa values of 3.128 (p?a1pKa1), 4.761 (p?a2pKa2), and 6.396 (p?a3pKa3).
What is the predominant form of citric acid at pH 4.244.24?
C6H5O3−7C6H5O73−
H3C6H5O7H3C6H5O7
H2C6H5O−7H2C6H5O7−
HC6H5O2−7HC6H5O72−
What is the predominant form of citric acid at pH 6.206.20?
C6H5O3−7C6H5O73−
H2C6H5O−7H2C6H5O7−
H3C6H5O7H3C6H5O7
HC6H5O2−7HC6H5O72−
What is the second most abundant species of citric acid at pH 4.244.24?
H2C6H5O−7H2C6H5O7−
C6H5O3−7C6H5O73−
H3C6H5O7H3C6H5O7
HC6H5O2−7HC6H5O72−
What is the second most abundant species of citric acid at pH 6.206.20?
H2C6H5O−7H2C6H5O7−
C6H5O3−7C6H5O73−
H3C6H5O7H3C6H5O7
HC6H5O2−7
Homework Answers
Q1. What is the predominant form of citric acid at pH 4.24? : H2C6H5O-
Q2. What is the predominant form of citric acid at pH 6.20? : HC6H5O2-
Q3. What is the second most abundant species of citric acid at pH 4.24? : HC6H5O2-
Q4. What is the second most abundant species of citric acid at pH 6.20? : C6H5O3-
Explanation
(1) The given pH 4.24 is closer to pKa2 4.761. The two species associated with this pKa2 is H2C6H5O- (acidic component) and HC6H5O2- (basic component)
Since pH is less than pKa2, therefore acidic component is more than the conjugate base component. Hence concentration of H2C6H5O- will be more than HC6H5O2-
Add Answer to:
Citric acid (H3C6H5O7H3C6H5O7) has p?apKa values of 3.128
(p?a1pKa1), 4.761 (p?a2pKa2), and 6.396 (p?a3pKa3).
What is...
Need help with below Question. Citric acid (which we can abbreviate as H3Cit) is a triprotic...
Need help with below Question. Citric acid (which we can abbreviate as H3Cit) is a triprotic carboxylic acid with the following acidity constants pKa1 = 3.128, pKa2 =4.761, and pKa3 = 6.396. a) A solution is made by adding lemon juice to water until the pH is 2.20. Assuming all the acidity is from dissociation of citric acid, find the total concentration of citrate species (i.e., TOTCit) and the concentration of HCit2-. b) The solution in part (a) is diluted...
Show all work 2. (8 points) Citric acid (CH,O(COOH)3) is a triprotic acid with Ka values...
Show all work
2. (8 points) Citric acid (CH,O(COOH)3) is a triprotic acid with Ka values of 7.44x 10-, 1.73 × 10-5 and 4.02 × 10-7. For a 0.15 M solution of citric acid at pH 6.4, what are the predominant species? O C3H O(COOH)3 and C,H, O(COOH) COO 0 C,H50(COOH)2C00 ○ C3H50(COOH)2C00-and C3H,OC00H (COO-)2 。C3HsOCOOH(COO-)2 and C3H50(COO-)s
11-24. What is the predominant form of citric acid at pH 5.00?
11-24. What is the predominant form of citric acid at pH 5.00?
[e] The following shows the chemical structure of aspartic acid and the Ka values for its...
[e] The following shows the chemical structure of aspartic acid and the Ka values for its respective bolded protons (Ka = 1.02 x 10-2) NH CHCH,COOH (Ka = 1.26 x 10-4) COOH (Ka 9.95 x 10-11) ) 12 marks] Give the structure of the most predominant species and the second predominant species at pH3.5. Most predominant species Second predominant species (ii) 12 mark] Give the structure of the most predominant species and the second predominant species at pH 5.5 Most...
The electrochemical cell shown can be used to calculate the formation constant (Kf) for a metal...
The electrochemical cell shown can be used to calculate the
formation constant (Kf) for a metal (M) and EDTA. The cell has a
potential of −0.266 V. The right half‑cell contains a metal ion
(M2+) with a standard reduction potential of −0.236 V.
M2+ + 2e −−⇀↽−M(s) E°=−0.236 V
Citric acid has three pKa values: 3.128, 4.761, and 6.396.
Calculate the Kf for the metal–EDTA complex.
Kf=
Voltmeter H, (9) PH2=0.40 bar Salt bridge 30 mL of 0.010 M citric...
what are the correct answers? Question 4 (1 point) Saved How many equivalents of NaOH base would you expect to add to phosphoric acid when adjusting the pH to 6.82 ? Hint: pKa values are in the...
what are the correct answers?
Question 4 (1 point) Saved How many equivalents of NaOH base would you expect to add to phosphoric acid when adjusting the pH to 6.82 ? Hint: pKa values are in the notes 0.5 1.5 2.5 o 1.0 2.0 Question 6 (1 point) Citric acid is a triprotic acid with three carboxylic acid groups having pK,values of 3.1,4.8, and 64. If a solution of citric acid has a predominantly means greater then 50% pH of...
PH = pk,+ log[A-]/[HA] он OH NH2 The neutral structure of aspartic acid pK(carboxylic acid)- 1.99...
pH = pk,+ log[A-]/[HA] он OH NH2 The neutral structure of aspartic acid pK(carboxylic acid)- 1.990, pK(ammonium)-10.002, pK(substituent) 3.900 (4 points) Determine the relative concentrations of the principle and second most abundant species of aspartic acid (principle/second) at plH 3.000 and pH -7.000. 3.
pH = pk,+ log[A-]/[HA] он OH NH2 The neutral structure of aspartic acid pK(carboxylic acid)- 1.990, pK(ammonium)-10.002, pK(substituent) 3.900
(4 points) Determine the relative concentrations of the principle and second most abundant species of aspartic acid...
8. Phosphoric acid H3(PA) is a triprotic molecule that can be present in solution in the following forms. H3(PA), H2...
8. Phosphoric acid H3(PA) is a triprotic molecule that
can be present in solution in the following forms. H3(PA), H2(PA)-,
H(PA)-2, H(PA)-3
pts) Phosphoric acid HPAIS a tiorotic moiecule that can be presen in soludon in the following foms Hat PA, HaPA HIPAFAY The pK, values for Hi(PA) are the following: pK 2.148 pK2 7.198 pK3 12.375 a) What is the principal form when the solution pH 5.35? b) What is the second most abundant form of TBA at pH...
What is the ratio of citric acid (pK1 = 3.09) to monosodium citrate in a 1.0 M citric acid...
What is the ratio of citric acid (pK1 = 3.09) to monosodium citrate in a 1.0 M citric acid solution with a pH = 2.09
Calculate the pH of a 0.01770.0177 M solution of arginine hydrochloride (arginine·HClarginine·HCl, H2Arg+H2Arg+). Arginine has p?apKa...
Calculate the pH of a 0.01770.0177 M solution of arginine hydrochloride (arginine·HClarginine·HCl, H2Arg+H2Arg+). Arginine has p?apKa values of 1.8231.823 (p?a1pKa1), 8.9918.991 (p?a2pKa2), and 12.0112.01 (p?a3pKa3). pH=pH= Calculate the concentration of each species of arginine in the solution. [H3Arg2+]=[H3Arg2+]= MM [H2Arg+]=[H2Arg+]= MM [HArg]=[HArg]= MM [Arg−]=[Arg−]= M
Show all work
2. (8 points) Citric acid (CH,O(COOH)3) is a triprotic acid with Ka values of 7.44x 10-, 1.73 × 10-5 and 4.02 × 10-7. For a 0.15 M solution of citric acid at pH 6.4, what are the predominant species? O C3H O(COOH)3 and C,H, O(COOH) COO 0 C,H50(COOH)2C00 ○ C3H50(COOH)2C00-and C3H,OC00H (COO-)2 。C3HsOCOOH(COO-)2 and C3H50(COO-)s
11-24. What is the predominant form of citric acid at pH 5.00?
[e] The following shows the chemical structure of aspartic acid and the Ka values for its respective bolded protons (Ka = 1.02 x 10-2) NH CHCH,COOH (Ka = 1.26 x 10-4) COOH (Ka 9.95 x 10-11) ) 12 marks] Give the structure of the most predominant species and the second predominant species at pH3.5. Most predominant species Second predominant species (ii) 12 mark] Give the structure of the most predominant species and the second predominant species at pH 5.5 Most...
The electrochemical cell shown can be used to calculate the
formation constant (Kf) for a metal (M) and EDTA. The cell has a
potential of −0.266 V. The right half‑cell contains a metal ion
(M2+) with a standard reduction potential of −0.236 V.
M2+ + 2e −−⇀↽−M(s) E°=−0.236 V
Citric acid has three pKa values: 3.128, 4.761, and 6.396.
Calculate the Kf for the metal–EDTA complex.
Kf=
Voltmeter H, (9) PH2=0.40 bar Salt bridge 30 mL of 0.010 M citric...
what are the correct answers?
Question 4 (1 point) Saved How many equivalents of NaOH base would you expect to add to phosphoric acid when adjusting the pH to 6.82 ? Hint: pKa values are in the notes 0.5 1.5 2.5 o 1.0 2.0 Question 6 (1 point) Citric acid is a triprotic acid with three carboxylic acid groups having pK,values of 3.1,4.8, and 64. If a solution of citric acid has a predominantly means greater then 50% pH of...
pH = pk,+ log[A-]/[HA] он OH NH2 The neutral structure of aspartic acid pK(carboxylic acid)- 1.990, pK(ammonium)-10.002, pK(substituent) 3.900 (4 points) Determine the relative concentrations of the principle and second most abundant species of aspartic acid (principle/second) at plH 3.000 and pH -7.000. 3.
pH = pk,+ log[A-]/[HA] он OH NH2 The neutral structure of aspartic acid pK(carboxylic acid)- 1.990, pK(ammonium)-10.002, pK(substituent) 3.900
(4 points) Determine the relative concentrations of the principle and second most abundant species of aspartic acid...
8. Phosphoric acid H3(PA) is a triprotic molecule that
can be present in solution in the following forms. H3(PA), H2(PA)-,
H(PA)-2, H(PA)-3
pts) Phosphoric acid HPAIS a tiorotic moiecule that can be presen in soludon in the following foms Hat PA, HaPA HIPAFAY The pK, values for Hi(PA) are the following: pK 2.148 pK2 7.198 pK3 12.375 a) What is the principal form when the solution pH 5.35? b) What is the second most abundant form of TBA at pH...
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