The addition of hydrofluoric acid and ________ to water produces a buffer solution.
A)NaF
B)HF
C)NaN
D)NaBr
E)KI

Question

The addition of hydrofluoric acid and ________ to water produces a buffer solution.
A)NaF 
B)HF 
C)NaN 
D)NaBr 
E)KI

Quizplus · Accepted Answer

When hydrofluoric acid (HF) is added to water, it partially dissociates to form fluoride ions (F-). Adding sodium fluoride (NaF) to this solution results in the formation of a buffer solution as sodium fluoride is the salt of the weak acid (HF) and its conjugate base (F-). This buffer system is important in many analytical procedures and in industrial processes. Therefore, choice A is the best choice. The other options do not produce a buffer solution when added to water.

The Addition of Hydrofluoric Acid and ________ to Water Produces