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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 2, Problem 10TYK
Textbook Problem
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Due to a sudden hormonal imbalance, a patient’s blood was tested and shown to have a pH of 7.5. What does this pH value mean?

a. This is more acidic than normal blood.

b. It represents a weak alkaline fluid.

c. This is caused by a release of large amounts of hydrogen ions into the system.

d. The reaction H 2 CO 3 HCO 3 - +H + is pushed to the left.

e. This is probably caused by excess CO2 in the blood.

Expert Solution
Summary Introduction

Introduction:

Acidic or basic character is expressed in terms of pH (potential of hydrogen). It is the negative logarithm of the concentration of H+. If the pH is 7, the solution is neutral. If pH > 7, it is basic or alkaline. If pH < 7, it is acidic. Substances are classified as acidic, basic, and neutral depending on their ability to change the concentration of H+ and OH in a given medium.

Explanation of Solution

Justification for the correct answer:

Option (b) states that if the pH of blood is 7.5, it represents a weak alkaline fluid. A pH above 7 indicates that the solution is alkaline. A pH value more than 7 indicates that the solution is alkaline. Hence, option (b) is correct.

Justification for the incorrect answers:

Option (a) states that if the pH of blood is 7.5, it is more acidic than normal blood. The pH of blood ranges from 7.3 to 7.5; so, it is either equally or less acidic than normal blood. So, it is an incorrect option.

Option (c) states that if the pH of blood is 7.5, it causes the release of a large number of H+ ions. It is false as when pH is above 7, the number of H+ is less than that of OH. So, it is an incorrect option

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