Amino acid D has pK of 4.7. What is the ratio of [D-]/[D] at pH 4.7?...

Question

Question

Amino acid D has pK of 4.7. What is the ratio of [D-]/[D] at pH 4.7? (a) 0.1 (b) 1 (c) 10 (d) 100

Can someone tell me the answer and also explain the concept

Answer 1

Answer #1

this is the simple question from the application of Handerson-Hasselbalk equation

Answer 2

Similar Homework Help Questions

question 1. Tell me the likely charges on the following amino acids at the indicated pH....

question 1. Tell me the likely charges on the following amino acids at the indicated pH. (please describe the steps) thanks. Aspartic acid (pK 4.7) at a pH of 9 Glutamic acid (pK 4.7) at a pH of 2 Lysine (pK of 10.2) at a pH of 7 Lysine (pK of 10.2) at a pH of 10.2
11. If a weak acid has a pK of 5, what is the ratio of [base]/[acid]...

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...
The pK of the side chain of amino acid X in a polypeptide is normally in...

The pK of the side chain of amino acid X in a polypeptide is normally in the range of 9-10 and carries a positive charge when protonated. Suppose you have a soluble globular protein and you find there is an X that has a pK of 6.5. What is the most likely reason for such a large drop in pK? Circle the correct answer. a) X is on the surface of the protein where it ion pairs with the carboxylate...

33) What is the overall charge of the amino acid, alanine, at pH 10? 33) B)-1...

33) What is the overall charge of the amino acid, alanine, at pH 10? 33) B)-1 D) No overall charge 34) As applied to the chemistry of amino acids, what is the definition for the isoelectric 34) point? A) The pH at which the amino acid exists primarily in its neutral form. B) The pH at which the amino acid exists primarily in its acidic form. C) The pH at which the amino acid exists as a mixture of isomers....
A non-natural amino acid has been synthesized. The carboxylic acid has a pk - 3.21, the...

A non-natural amino acid has been synthesized. The carboxylic acid has a pk - 3.21, the protonated amine has a pk = 9.59, and the side chain contains an alcohol which has a pk = 16.09. What is the pl of this amino acid? Your answer should be to the nearest hundredths. a Answer:
A non-natural amino acid has been synthesized. The carboxylic acid has a pk - 3.21, the...

A non-natural amino acid has been synthesized. The carboxylic acid has a pk - 3.21, the protonated amine has a pk = 9.59, and the side chain contains an alcohol which has a pk = 16.09. What is the pl of this amino acid? Your answer should be to the nearest hundredths. a Answer:

A non-natural amino acid has been synthesized. The carboxylic acid has a pk = 3.04, the...

A non-natural amino acid has been synthesized. The carboxylic acid has a pk = 3.04, the protonated amine has a pk, = 9.43, and the side chain contains a pyridine which, when protonated, has a pk, = 5.20. What is the pl of this amino acid? Your answer should be to the nearest hundredths. 00 ton Answer:
A non-natural amino acid has been synthesized. The carboxylic acid has a pk - 3.21, the...

A non-natural amino acid has been synthesized. The carboxylic acid has a pk - 3.21, the protonated amine has a pk = 9.59, and the side chain contains an alcohol which has a pk = 16.09. What is the pl of this amino acid? Your answer should be to the nearest hundredths. a Answer: For each compound, indicate if it will or will not produce one of the 20 naturally occuring amino acids if used as the starting material in...
(b) The amino acid lysine has the following values of pK : PK1 =2.2, pK2 = 8.9, PKR = 10.5 (the pK, of the amino gro...

(b) The amino acid lysine has the following values of pK : PK1 =2.2, pK2 = 8.9, PKR = 10.5 (the pK, of the amino group in the side chain). At pH 7 it has the structure shown below (6). Draw the structure that you would expect for lysine at pH 9.7, indicating the charges as appropriate. HZN 0 HINA (2 marks) (c) Phenol (C6H5OH) and 2,4,6-trichlorophenol (C6H2C13OH) are both weak acids with pK, values of 9.89 and 6.21, respectively,...

(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 r...

(1) The following diagram represents a titration curve of histidine as pH increases; pKa = 1.82 represents the terminal carboxylic acid group. pK, represents the terminal amino group: 6.0 represents the R-group, and pK, E 9.17 7.59 pH 182 3.0 20 10 H (equivalents) At what point on the diagram is histidine predominantly present as the following species? COO A, at pH < 1.82 B. between pH 1.82 and pH 6.0 C) between pH 6.0 and pH 9.17 D. at...