Organic And Biological Chemistry
Organic And Biological Chemistry
7th Edition
ISBN: 9781305081079
Author: STOKER, H. Stephen (howard Stephen)
Publisher: Cengage Learning,
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Chapter 7, Problem 7.49EP

(a)

Interpretation Introduction

Interpretation: Whether the boiling point will be the same or different for the compounds (+)−lactic acid and (−)−lactic acid has to be predicted.

Concept introduction: Lactic acid is an organic compound with the formula CH3CH(OH)COOH.  Lactic acid exists in two different forms which are (+)−lactic acid and (−)−lactic acid.  These two forms of lactic acid are enantiomers.

(a)

Expert Solution
Check Mark

Answer to Problem 7.49EP

The boiling point for (+)−lactic acid and (−)−lactic acid is same.

Explanation of Solution

The most of the properties of (+)−lactic acid and (−)−lactic acid are same.  But the properties involving the interaction with the plane polarised light and other chiral molecules, like solubility in a chiral solvent will be different.  The boiling point of (+)−lactic acid and (−)−lactic acid will be same.

(b)

Interpretation Introduction

Interpretation: Whether the optical activity will be the same or different for the compounds (+)−lactic acid and (−)−lactic acid has to be predicted.

Concept introduction: Lactic acid is an organic compound with the formula CH3CH(OH)COOH.  Lactic acid exists in two different forms which are (+)−lactic acid and (−)−lactic acid.  These two forms of lactic acid are enantiomers.

(b)

Expert Solution
Check Mark

Answer to Problem 7.49EP

The optical activity for (+)−lactic acid and (−)−lactic acid is different.

Explanation of Solution

The most of the properties of (+)−lactic acid and (−)−lactic acid are same.  But the properties involving the interaction with the plane polarised light and other chiral molecules, like solubility in a chiral solvent will be different.

Hence, the optical activity for (+)−lactic acid and (−)−lactic acid is different.

(c)

Interpretation Introduction

Interpretation: Whether the reaction with ethanol will be the same or different for the compounds (+)−lactic acid and (−)−lactic acid has to be predicted.

Concept introduction: Lactic acid is an organic compound with the formula CH3CH(OH)COOH.  Lactic acid exists in two different forms which are (+)−lactic acid and (−)−lactic acid.  These two forms of lactic acid are enantiomers.

(c)

Expert Solution
Check Mark

Answer to Problem 7.49EP

The the reaction with ethanol for (+)−lactic acid and (−)−lactic acid is same.

Explanation of Solution

The most of the properties of (+)−lactic acid and (−)−lactic acid are same.  But the properties involving the interaction with the plane polarised light and other chiral molecules, like solubility in a chiral solvent will be different.  The reaction of (+)−lactic acid and (−)−lactic acid with ethanol will be similar.

Hence, the reaction with ethanol for (+)−lactic acid and (−)−lactic acid is same.

(d)

Interpretation Introduction

Interpretation: Whether the reaction with (−)−2,3−butanediol will be the same or different for the compounds (+)−lactic acid and (−)−lactic acid has to be predicted.

Concept introduction: Lactic acid is an organic compound with the formula CH3CH(OH)COOH.  Lactic acid exists in two different forms which are (+)−lactic acid and (−)−lactic acid.  These two forms of lactic acid are enantiomers.

(d)

Expert Solution
Check Mark

Answer to Problem 7.49EP

The reaction with (−)−2,3−butanediol for (+)−lactic acid and (−)−lactic acid is different.

Explanation of Solution

The two forms of lactic acid, (+)−lactic acid and (−)−lactic acid are enantiomers.  Therefore, most of the properties of (+)−lactic acid and (−)−lactic acid are same.  But the properties involving the interaction with the plane polarised light and other chiral molecules, like solubility in a chiral solvent will be different.  The reaction of (+)−lactic acid and (−)−lactic acid with (−)−2,3−butanediol will be different.

Hence, the reaction with (−)−2,3−butanediol for (+)−lactic acid and (−)−lactic acid is different.

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Chapter 7 Solutions

Organic And Biological Chemistry

Ch. 7.1 - In terms of mass percent, which of the following...Ch. 7.1 - Which of the following is the most abundant type...Ch. 7.2 - Which of the following statements concerning the...Ch. 7.2 - Prob. 2QQCh. 7.3 - Prob. 1QQCh. 7.3 - Prob. 2QQCh. 7.3 - Which of the following is not a possible value for...Ch. 7.3 - The complete hydrolysis of a polysaccharide...Ch. 7.4 - Prob. 1QQCh. 7.4 - Prob. 2QQ
Ch. 7.4 - Prob. 3QQCh. 7.4 - Prob. 4QQCh. 7.5 - Prob. 1QQCh. 7.5 - Prob. 2QQCh. 7.6 - Prob. 1QQCh. 7.6 - Which of the following Fischer projection formulas...Ch. 7.6 - Prob. 3QQCh. 7.6 - Prob. 4QQCh. 7.7 - Prob. 1QQCh. 7.7 - Prob. 2QQCh. 7.8 - Prob. 1QQCh. 7.8 - Which of the following statements about...Ch. 7.8 - Prob. 3QQCh. 7.9 - Prob. 1QQCh. 7.9 - Prob. 2QQCh. 7.9 - Prob. 3QQCh. 7.9 - In which of the following pairs of monosaccharides...Ch. 7.9 - In which of the following pairs of monosaccharides...Ch. 7.10 - Prob. 1QQCh. 7.10 - Which of the following structures represents a...Ch. 7.10 - Prob. 3QQCh. 7.10 - Prob. 4QQCh. 7.10 - Prob. 5QQCh. 7.11 - Prob. 1QQCh. 7.11 - Which of the following is the correct Haworth...Ch. 7.12 - Prob. 1QQCh. 7.12 - Prob. 2QQCh. 7.12 - Prob. 3QQCh. 7.12 - Prob. 4QQCh. 7.12 - Prob. 5QQCh. 7.13 - Which of the following disaccharides contains...Ch. 7.13 - Which of the following disaccharides will produce...Ch. 7.13 - In which of the following disaccharides is the...Ch. 7.13 - In which of the following pairs of disaccharides...Ch. 7.13 - Which of the following disaccharides is not a...Ch. 7.13 - The terms milk sugar and table sugar apply,...Ch. 7.14 - Prob. 1QQCh. 7.14 - Prob. 2QQCh. 7.15 - Which of the following statements about...Ch. 7.15 - Prob. 2QQCh. 7.16 - Which of the following storage polysaccharides has...Ch. 7.16 - Prob. 2QQCh. 7.16 - Prob. 3QQCh. 7.16 - Prob. 4QQCh. 7.17 - Prob. 1QQCh. 7.17 - Which of the following statements about cellulose...Ch. 7.17 - Chitin is a polysaccharide in which the...Ch. 7.18 - Which of the following statements about the...Ch. 7.18 - Which of the following statements about the...Ch. 7.19 - Which of the following is not classified as a...Ch. 7.19 - Prob. 2QQCh. 7.20 - Which of the following types of compounds are...Ch. 7.20 - Which of the following is not a biochemical...Ch. 7 - Prob. 7.1EPCh. 7 - Prob. 7.2EPCh. 7 - Prob. 7.3EPCh. 7 - Prob. 7.4EPCh. 7 - Prob. 7.5EPCh. 7 - Prob. 7.6EPCh. 7 - Prob. 7.7EPCh. 7 - Prob. 7.8EPCh. 7 - Prob. 7.9EPCh. 7 - Prob. 7.10EPCh. 7 - Prob. 7.11EPCh. 7 - Prob. 7.12EPCh. 7 - Prob. 7.13EPCh. 7 - Prob. 7.14EPCh. 7 - Prob. 7.15EPCh. 7 - Prob. 7.16EPCh. 7 - Prob. 7.17EPCh. 7 - Prob. 7.18EPCh. 7 - Prob. 7.19EPCh. 7 - Prob. 7.20EPCh. 7 - Prob. 7.21EPCh. 7 - Prob. 7.22EPCh. 7 - Prob. 7.23EPCh. 7 - Prob. 7.24EPCh. 7 - Prob. 7.25EPCh. 7 - Indicate whether or not each of the molecules in...Ch. 7 - Prob. 7.27EPCh. 7 - Prob. 7.28EPCh. 7 - Prob. 7.29EPCh. 7 - Prob. 7.30EPCh. 7 - Prob. 7.31EPCh. 7 - Prob. 7.32EPCh. 7 - Prob. 7.33EPCh. 7 - Prob. 7.34EPCh. 7 - Prob. 7.35EPCh. 7 - Draw the Fischer projection formula for each of...Ch. 7 - Prob. 7.37EPCh. 7 - Prob. 7.38EPCh. 7 - Prob. 7.39EPCh. 7 - Prob. 7.40EPCh. 7 - Prob. 7.41EPCh. 7 - Prob. 7.42EPCh. 7 - Prob. 7.43EPCh. 7 - Prob. 7.44EPCh. 7 - Prob. 7.45EPCh. 7 - Prob. 7.46EPCh. 7 - Prob. 7.47EPCh. 7 - Prob. 7.48EPCh. 7 - Prob. 7.49EPCh. 7 - Prob. 7.50EPCh. 7 - Prob. 7.51EPCh. 7 - Prob. 7.52EPCh. 7 - Prob. 7.53EPCh. 7 - Prob. 7.54EPCh. 7 - Prob. 7.55EPCh. 7 - 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