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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892
BuyFind

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892

Solutions

Chapter
Section
Chapter 3.1, Problem 3SB
Textbook Problem
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Do carboxyl groups, amino groups, and phosphate groups act as acids or bases?

Expert Solution
Summary Introduction

To review:

Whether carboxyl, amino, and phosphate groups can act as acids or bases.

Introduction:

Biomolecules are those organic compounds that form carbohydrates, lipids, proteins, and nucleic acids. These are called so because these molecules are essential for the survival of living organisms. Acids are substances that dissociate to release H+ and increase its concentration in water. Bases are the substances which dissociate to release OH or take up H+ from the water.

Explanation of Solution

Carboxyl group can be written as –COOH. It has one proton linked to the electron withdrawing group (carbonyl and oxygen). It can donate a proton to form carboxylate ion. Hence, it acts as an acid.

The equation involved is:

Amino group is –NH2. It has one lone pair on the nitrogen atom. So, it can accept a proton to form ammonium ion. Hence, it acts as a base.

The equation involved is:

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Chapter 3 Solutions

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