A solution contains Ba2+ (1.0 × 10-3 M) , Ca2+ (1.0 × 10-3 M) and K+ (1.0 × 10-3 M) . Drops of a 5.0 × 10-1 M solution of NaF were added through a microburet until the [F-] in the solution mix reached 1.5 × 10-3 M. Should a precipitate form? If so, what is the precipitate? The Ksp values are BaF2: 1.0 × 10-6, CaF2: 5.3 × 10-9. (Neglect the slight change in volume resulting from the added NaF solution.)
A) a precipitate consisting of BaF2 only should form
B) a precipitate consisting of CaF2 and KF should form
C) a precipitate consisting of BaF2 and CaF2 should form
D) a precipitate consisting of CaF2 only should form
E) No precipitate should form.
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