Question

The buffer solutions play and important role in:

• A. Increasing the pH value
• B. Decreasing the pH value
• C. Keeping the pH constant
• D. None of these

Answer 1

The correct option is C Keeping the pH constant

We need solutions to have constant $pH$ but they cannot retain $pH$ for a long time.If it comes into contact with air, they will absorb $C{O}_2$ and becomes acidic, if placed in a container, the glass dissolves and the solution becomes basic.To prevent it, buffer solutions are made.

Buffer solutions are those solutions whose $pH$ is not changed to a great extent even with the small addition of acid and base.