K _a for HF is 3.5×10^{- 4}. A 0.10 M solution of sodium fluoride is:

Question

Quizplus · Accepted Answer

The equation given is K= [H+][F-]/[HF]. Since NaF is a salt of a strong base and weak acid, it will hydrolyze in water, producing OH- ions. This will shift the equilibrium to the left, creating more HF and H+ ions, making the solution weakly acidic. Therefore, the correct answer is option D, weakly basic, which is the opposite of weakly acidic, and it is incorrect to choose any other option.

K a for HF Is 3

K _a for HF Is 3