Question
A solution of NaF is added dropwise to a solution that is 0.0144 M in Ba+2 ions.  At what F- concentration will BaF2 start to precipitate?  Neglect volume changes.  For BaF2, Ksp = 1.7 x 10-6
 
2.7 × 10-3 M
1.1 × 10-2 M
2.4 × 10-8 M
5.9 × 10-5 M
1.2 x 10-4 M
 

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