A Solution of NaF Is Added Dropwise to a Solution

Multiple Choice

A solution of NaF is added dropwise to a solution that is 0.0144 M in Ba²⁺. When the concentration of F^- exceeds M, BaF₂ will precipitate. Neglect volume changes. For BaF₂,
K_sp = 1.7 × 10^{- 6}.

A) 1.1 × 10^{- 2}
B) 1.2 × 10^{- 4}
C) 2.4 × 10^{- 8}
D) 2.7 × 10^{- 3}
E) 5.9 × 10^{- 5}