The validation of the fact that maltose gives a positive Benedict’s test has to be predicted. Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Question

Describe how a solution of lactose would react toward these reagents. a. Benedict's b. Barfoed's

Answer 1

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 18.122EP

(a)

Interpretation Introduction

Interpretation: The validation of the fact that maltose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(b)

Interpretation Introduction

Interpretation: The validation of the fact that cellobiose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(c)

Interpretation Introduction

Interpretation: The validation of the fact that sucrose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(d)

Interpretation Introduction

Interpretation: The validation of the fact that lactose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

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Answer 2

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 18.122EP

(a)

Interpretation Introduction

Interpretation: The validation of the fact that maltose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(b)

Interpretation Introduction

Interpretation: The validation of the fact that cellobiose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(c)

Interpretation Introduction

Interpretation: The validation of the fact that sucrose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(d)

Interpretation Introduction

Interpretation: The validation of the fact that lactose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

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Answer 3

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 18.122EP

(a)

Interpretation Introduction

Interpretation: The validation of the fact that maltose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(b)

Interpretation Introduction

Interpretation: The validation of the fact that cellobiose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(c)

Interpretation Introduction

Interpretation: The validation of the fact that sucrose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(d)

Interpretation Introduction

Interpretation: The validation of the fact that lactose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

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Answer 4

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 18, Problem 18.122EP

(a)

Interpretation Introduction

Interpretation: The validation of the fact that maltose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(b)

Interpretation Introduction

Interpretation: The validation of the fact that cellobiose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(c)

Interpretation Introduction

Interpretation: The validation of the fact that sucrose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(d)

Interpretation Introduction

Interpretation: The validation of the fact that lactose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

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Answer 5

Chapter 18, Problem 18.122EP

(a)

Interpretation Introduction

Interpretation: The validation of the fact that maltose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(b)

Interpretation Introduction

Interpretation: The validation of the fact that cellobiose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(c)

Interpretation Introduction

Interpretation: The validation of the fact that sucrose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

(d)

Interpretation Introduction

Interpretation: The validation of the fact that lactose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 6

Chapter 18, Problem 18.122EP

(a)

Interpretation Introduction

Interpretation: The validation of the fact that maltose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 7

Chapter 18, Problem 18.122EP

(a)

Interpretation Introduction

Interpretation: The validation of the fact that maltose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 8

(b)

Interpretation Introduction

Interpretation: The validation of the fact that cellobiose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 9

(b)

Interpretation Introduction

Interpretation: The validation of the fact that cellobiose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 10

(c)

Interpretation Introduction

Interpretation: The validation of the fact that sucrose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 11

(c)

Interpretation Introduction

Interpretation: The validation of the fact that sucrose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 12

(d)

Interpretation Introduction

Interpretation: The validation of the fact that lactose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 13

(d)

Interpretation Introduction

Interpretation: The validation of the fact that lactose gives a positive Benedict’s test has to be predicted.

Concept introduction: Monosaccharides and most of the disaccharides give positive test with Benedict’s solution. It is used to detect the presence of aldehyde or alpha hydroxy ketones. A positive test with Benedict’s solution is confirmed by the formation of a brick-red precipitate.

Answer 14

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Answer 25

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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