Chapter 18, Problem 88A

sWhat happens when an acid is added to a solution containing the ${\text{HF/F}}^{-}$ buffer system?

Interpretation Introduction

Interpretation:

The effect of addition of an acid added to $HF/F^{-}$ buffer system needs to be explained.

Concept introduction:

Buffer solution is a solution in which tries not to change much $pH$ on adding small amount of acid and base.

Answer to Problem 88A

$H^{+}+F^{-}\to H{F}^{-}$

Explanation of Solution

When acid is added to $HF/F^{-}$ buffer system, it reacts with $F^{-}$ The equation is given as:

$H^{+}+F^{-}\to H{F}^{-}$

$pH$ will drop slightly on adding acid to buffer system $HF/F^{-}$

Conclusion

Thus buffer system resists the change in the value of $pH$ on adding small amount of acid and base. A little change in $pH$ occurs.