The structure of the most abundant form of histidine at given pH values is to be drawn. Concept introduction: The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH 3 + group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

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Answer 1

Question

Chapter 6, Problem 6.71P

Interpretation Introduction

Interpretation:

The structure of the most abundant form of histidine at given pH values is to be drawn.

Concept introduction:

The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH3+ group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

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Answer 2

Question

Chapter 6, Problem 6.71P

Interpretation Introduction

Interpretation:

The structure of the most abundant form of histidine at given pH values is to be drawn.

Concept introduction:

The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH3+ group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

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Answer 3

Question

Chapter 6, Problem 6.71P

Interpretation Introduction

Interpretation:

The structure of the most abundant form of histidine at given pH values is to be drawn.

Concept introduction:

The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH3+ group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

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Answer 4

Question

Chapter 6, Problem 6.71P

Interpretation Introduction

Interpretation:

The structure of the most abundant form of histidine at given pH values is to be drawn.

Concept introduction:

The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH3+ group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

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Answer 5

Chapter 6, Problem 6.71P

Interpretation Introduction

Interpretation:

The structure of the most abundant form of histidine at given pH values is to be drawn.

Concept introduction:

The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH3+ group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

Answer 6

Chapter 6, Problem 6.71P

Interpretation Introduction

Interpretation:

The structure of the most abundant form of histidine at given pH values is to be drawn.

Concept introduction:

The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH3+ group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

Answer 7

Chapter 6, Problem 6.71P

Interpretation Introduction

Interpretation:

The structure of the most abundant form of histidine at given pH values is to be drawn.

Concept introduction:

The general form of an α-amino acid has both an amino group and a carboxylic group. In the aqueous solution, the amino group is weakly basic, and the carboxylic group is weakly acidic. Under highly acidic conditions, the N atom in the amino group is protonated. As the pH of the solution increases, the most acidic proton can be removed from the carboxylic group. As the solution more basic, a proton from the side chain group is lost and the dominant form will be formed. As the solution becomes more basic, the proton of NH3+ group is deprotonated. The strongest acid has the lowest pKa value, and strongest base has a higher pKa value.

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 6 - Prob. 6.1P Ch. 6 - Prob. 6.2P Ch. 6 - Prob. 6.3P Ch. 6 - Prob. 6.4P Ch. 6 - Prob. 6.5P Ch. 6 - Prob. 6.6P Ch. 6 - Prob. 6.7P Ch. 6 - Prob. 6.8P Ch. 6 - Prob. 6.9P Ch. 6 - Prob. 6.10P

Solution Summary: The author explains the structure of the most abundant form of histidine at given pH values.

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