Chapter 18.4, Problem 51SSC

Interpretation Introduction

Interpretation:

The results of two experiments: addition of base in unbuffered and buffered solution of $pH=7$ are to be compared.

Concept introduction:

Buffer solution is the solution in which there is very slight change in $pH$ on addition of acid or base.

Answer to Problem 51SSC

Increase in $pH$ of unbuffered solution will be more than buffered solution.

Explanation of Solution

In buffer solution when base is added, hydroxyl ions from base react with acid part of buffer and try to neutralize it. So there is less increase in $pH$ value comparative to unbuffered solution.

Conclusion

There is very slight change in $pH$ on addition of acid or base in a buffer solution.