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Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079

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Section
BuyFindarrow_forward

Organic And Biological Chemistry

7th Edition
STOKER + 1 other
ISBN: 9781305081079
Textbook Problem

Several carboxylic acid salts are used as

  1. a. food preservatives
  2. b. flavoring agents
  3. c. pheromones
  4. d. no correct response

Interpretation Introduction

Interpretation:

Several use of carboxylic acid salt has to be chosen from the given options.

Concept Introduction:

The name of the carboxylic acid itself implies that it is acidic.  Addition of carboxylic acid to water results in ionization.  Hydrogen ion transfer occurs from carboxylic acid to water and hydronium ion is formed.  Carboxylate ion is also formed due to the loss of hydrogen ion from carboxylic acid.

Carboxylate ion is the negative ion which is formed when one or more acidic protons are lost from carboxylic acid.  Similar to carboxylic acid it reacts with strong base to form carboxylic acid salt and water.

Salt of carboxylic acid is more soluble in water than the corresponding carboxylic acid.  They increase the pH of food in which they are used.

Explanation

Reason for correct option:

Carboxylic acid salts are more soluble in water.  The salts of carboxylic acids do not kill the microorganisms that are present in food directly.  Instead, they prevent the further growth of microorganism by increasing the pH of the food in which they are used.  Therefore carboxylic acid salts are used as food preservatives.

Therefore, the correct option is option (a).

Reason for incorrect option:

Option (b) tells that carboxylic acid salts are used as flavoring agents...

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