The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted. Concept introduction: If an − OH group and an − OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two − OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Question

Identifying the stereochemistry of natural Write the complete common (not IUPAC) name of each molecule below. Note: if a molecule is one of a pair of enantiomers, be sure you start its name with D- or L- so we know which enantiomer it is. molecule H O-C-CH2 H3N. HN N H C=O common name (not the IUPAC name) NH3 ☐ H3N H ☐ CH2 X

Answer 1

Question

Chapter 18, Problem 18.124EP

(a)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(b)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(c)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(d)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

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Identifying the stereochemistry of natural Write the complete common (not IUPAC) name of each molecule below. Note: if a molecule is one of a pair of enantiomers, be sure you start its name with D- or L- so we know which enantiomer it is. molecule H O-C-CH2 H3N. HN N H C=O common name (not the IUPAC name) NH3 ☐ H3N H ☐ CH2 X

> Draw the structure of alanine at pH 1.2. Click and drag to start drawing a structure.

Understanding the general acid-base properties of amino acids O Proteins Imagine each of the molecules shown below was found in an aqueous solution. Can you tell whether the solution is acidic, basic, or neutral? molecule The solution is... 010 H3N-CH-C-OH CH HO CH3 O acidic O basic neutral O (unknown) H3N HO 0 O acidic O basic neutral ○ (unknown) H3N-CH-C-O CH2 CH3-CH-CH3 O acidic O basic Oneutral ○ (unknown) O= X H2N-CH-C-O CH3 CH CH3 acidic O basic O neutral ○ (unknown) ? 000

Answer 2

Question

Chapter 18, Problem 18.124EP

(a)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(b)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(c)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(d)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

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Answer 3

Question

Chapter 18, Problem 18.124EP

(a)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(b)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(c)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(d)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

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Answer 4

Question

Chapter 18, Problem 18.124EP

(a)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(b)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(c)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(d)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

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Answer 5

Chapter 18, Problem 18.124EP

(a)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(b)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(c)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

(d)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 6

Chapter 18, Problem 18.124EP

(a)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 7

Chapter 18, Problem 18.124EP

(a)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 8

(b)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 9

(b)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 10

(c)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 11

(c)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 12

(d)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 13

(d)

Interpretation Introduction

Interpretation: The number of acetal and hemiacetal carbon atoms in the given disaccharide has to be predicted.

Concept introduction: If an −OH group and an −OR group are attached to the same carbon atom, then the compound is known as a hemiacetal. If two −OR groups are attached to the same carbon atom, then the compound is known as an acetal.

Answer 14

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Ch. 18.1 - In terms of mass percent, which of the following...Ch. 18.1 - Which of the following is the most abundant type...Ch. 18.2 - Which of the following statements concerning the...Ch. 18.2 - Prob. 2QQ Ch. 18.3 - Prob. 1QQ Ch. 18.3 - Prob. 2QQ Ch. 18.3 - Which of the following is not a possible value for...Ch. 18.3 - The complete hydrolysis of a polysaccharide...Ch. 18.4 - Prob. 1QQ Ch. 18.4 - Prob. 2QQ

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