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Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425

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BuyFindarrow_forward

Introductory Chemistry: A Foundati...

9th Edition
Steven S. Zumdahl + 1 other
ISBN: 9781337399425
Textbook Problem
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. What characteristic properties do buffered solutions possess’?

Interpretation Introduction

Interpretation:

The characteristic properties that a buffer solution possess should be explained.

Concept Introduction:

A buffer solution can be defined as an aqueous solution which is capable of resisting pH changes upon addition of small amounts of a strong base and a strong acid as well as upon dilution by distilled water (or in general water). The action that corresponds to keep the resistance to any changes on pH is known as “buffering”. A buffer solution has a distinct definite pH value and hence is valuable in reaction conditions where one needs to maintain the pH value at a constant value. Blood is an example of a natural buffer which usually maintains the pH value around 7.4.

Explanation

There can be two main kinds of buffer systems depending on the pH values that one needs to achieve in preparation of the buffer solutions. The two main kinds are acidic and basic buffer solutions. In both these kinds of buffer solutions there are two main constituents.

In an acidic buffer a weak acid and its conjugate base are the two main components in the buffer system.

Whereas in a basic buffer solution a weak base and its conjugate acid are the two main components in the buffer system.

For a solution to successfully function as a buffer solution it must contain a conjugate acid base pair which involves a weak acid/base.

A buffer solution possesses certain characteristic properties. These can be listed as follows.

  1. A buffer solution is resistant to pH changes upon addition of small amounts of strong acid, strong base and upon dilution by distilled water...

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