   Chapter 17, Problem 98GQ

Chapter
Section
Textbook Problem

Buffer capacity is defined as the number of moles of a strong acid or strong base that is required to change the pH of 1 L of the buffer solution by one unit. What is the buffer capacity of a solution that is 0.10 M in acetic acid and 0.10 M in sodium acetate?

Interpretation Introduction

Interpretation:

For the given buffer which contains 0.10 M CH3COOH and 0.10 M CH3COONa the value of buffer capacity has to be determined.

Concept introduction:

A buffer is defined as a solution which does not show any change in its pH values on addition of small amount of acid or base.There are two types of buffer solutions, (1) Acidic Buffer  (2) Basic Buffer.

Buffer capacity is defined as on addition of acid and base in 1 L solution of buffer change in its pH value is unity. This is called as buffer capacity. It is denoted by β. When the ratio of acid and its base or vice-versa is unity then change in pH value is zero.

Explanation

The explantion for the buffer capacity of the given solution is given below.

Given:

Concentration of acetic acid is 0.10 M.

Concentration of acetate is 0.10 M.

As concentration of acid and its conjugate base is equal

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