Chapter 16.3, Problem 7RQ

Interpretation Introduction

Interpretation: The reason due to which buffer solution maintains the pH level during the addition of acid to the solution is to be determined.

Concept introduction: The property of buffer is that it doesn’t allow the change in $pH$ on addition of small amount of acid and base in it.

Answer to Problem 7RQ

A buffer solution resist change in pH because a buffer solution usually contains a weak acid and conjugate base or vice versa. When H positive ion added to a buffer, weak acids conjugate base will accept the ion and neutralize the OH negative ion present in the solution.  

Explanation of Solution

The importance of buffer solution is that it is able to maintain the pH of the solution neutral and stable by neutralising small amounts of acid or bases added to it. The buffer solution is important in maintaining a relatively constant pH in a solution.  

Conclusion

The property of buffer is that it doesn’t allow the change in $pH$ on addition of small amount of acid and base in it.

Buffer solution is a chemical substance that helps maintain a constant pH in a solution.