Homework Answers
The deprotonation happens when pH of the solution is higher than the pKa of the group of the amino acid. At pH 4, the deprotonation of the carboxyl and R groups occurs on the amino acid 1 and the amino terminus will be protonated and in the amino acid 2, the carboxyl group will be deprotonated and the amino terminus and R group will be protonated. Hence the correct answer are: A and B.
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5. Amino acid titration. The graph below shows a titration of an amino acid with NaOH....
5. Amino acid titration. The graph below shows a titration of an amino acid with NaOH. This experiment reveals several important features of this amino acid. A) What is the identity of the amino acid? [Write its full name.] B) Match the following points in the titration curve. [In the space beside each description (left), write a number (1-6) corresponding to a specific pH (right).] The amino acid is fully protonated. 1) pH=0.0 PH The amino acid is fully deprotonated....
At physiological pH, the carboxylic acid group of an amino acid will be zwitterion form while...
At physiological pH, the carboxylic acid group of an amino acid will be zwitterion form while the amino group will be -yielding the protonated, protonated deprotonated, protonated deprotonated, deprotonated protonated, deprotonated Question 38 1 pts The net charge on an amino acid at its isoelectric point (pl) is O +2 -1
help with this question Consider a 0.211 L solution of the amino acid aspartic acid (0.631...
help with this question
Consider a 0.211 L solution of the amino acid aspartic acid (0.631 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.25 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer...
Consider a 0.203 L solution of the amino acid aspartic acid (0.615 M), which has an...
Consider a 0.203 L solution of the amino acid aspartic acid (0.615 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.15 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer to 3 significant figures...
What is the classification of the side chain R group in the amino acid shown here?...
What is the classification of the side chain R group in the amino acid shown here? O A) acidic HN-CH-C-0 CH2 B) basic HN C) neutral -NH
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...
Question 1 Classify the following amino acid NH HN CH HO acidic basic neutral Question 2
Question 1 Classify the following amino acid NH HN CH HO acidic basic neutral Question 2
Suppose you have a peptide composed of 4 amino acids bonded together: glutamine, glycine, glutamic acid,...
Suppose you have a peptide composed of 4 amino acids bonded together: glutamine, glycine, glutamic acid, and the novel amino acid friendsamine, which has an ionizable side group with a pKa of 5.9. At pH 7.0, this peptide has a net charge of -2. What is the charge on the protonated form of the friendsamine side group? Explain how you determined the charge on the protonated friendsamine side group
Enzyme B has two arginine amino acid resídues that are responsible for catalysis. For catalysis one...
Enzyme B has two arginine amino acid resídues that are responsible for catalysis. For catalysis one arginine side chain is protonated and one is deprotonated. What is the optimal pH for Enzyme B activity? 2 4 6 10 12 please show
1. 9. The carboxylic acid proton of the anti-inflammatory drug Diclofenac has a pka of 4.2...
1. 9. The carboxylic acid proton of the anti-inflammatory drug Diclofenac has a pka of 4.2 One would expect this compound to be in the stomach (pH 2), and therefore in the gastric juices. Diclofenac pka = 4.2 HOO (a) protonated; soluble (b) protonated; insoluble (c) deprotonated; soluble d) deprotonated; insoluble HN _10. What would be the expected formal charge on a molecule of Diclofenac in the stomach? (a) O b) +1 (c)-1 (d) +2 (e) -2
5. Amino acid titration. The graph below shows a titration of an amino acid with NaOH. This experiment reveals several important features of this amino acid. A) What is the identity of the amino acid? [Write its full name.] B) Match the following points in the titration curve. [In the space beside each description (left), write a number (1-6) corresponding to a specific pH (right).] The amino acid is fully protonated. 1) pH=0.0 PH The amino acid is fully deprotonated....
At physiological pH, the carboxylic acid group of an amino acid will be zwitterion form while the amino group will be -yielding the protonated, protonated deprotonated, protonated deprotonated, deprotonated protonated, deprotonated Question 38 1 pts The net charge on an amino acid at its isoelectric point (pl) is O +2 -1
help with this question
Consider a 0.211 L solution of the amino acid aspartic acid (0.631 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.25 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer...
Consider a 0.203 L solution of the amino acid aspartic acid (0.615 M), which has an alpha carboxylic acid group (pka = 2.10), an alpha amine group (pka = 9.82), and a carboxylic acid group in the side chain (pka = 3.86). If the titration is started at a very low pH, how many liters of 2.15 M NaOH would you need to add to reach the isoelectric point of the amino acid? Give your answer to 3 significant figures...
What is the classification of the side chain R group in the amino acid shown here? O A) acidic HN-CH-C-0 CH2 B) basic HN C) neutral -NH
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...
Question 1 Classify the following amino acid NH HN CH HO acidic basic neutral Question 2
1. 9. The carboxylic acid proton of the anti-inflammatory drug Diclofenac has a pka of 4.2 One would expect this compound to be in the stomach (pH 2), and therefore in the gastric juices. Diclofenac pka = 4.2 HOO (a) protonated; soluble (b) protonated; insoluble (c) deprotonated; soluble d) deprotonated; insoluble HN _10. What would be the expected formal charge on a molecule of Diclofenac in the stomach? (a) O b) +1 (c)-1 (d) +2 (e) -2
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