# Problem: Ksp for CaF2 is 3.9 × 10−11. Would a precipitate of CaF2 form if Ca(NO3)2 and NaF solutions were mixed such that [Ca2+] = 2.0 × 10−4 M, and [F−] = 3.0 × 10−4 M? 1. no  2. yes, because Q is smaller than Ksp 3. yes, because Q is larger than Ksp

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Ksp for CaF2 is 3.9 × 10−11. Would a precipitate of CaF2 form if Ca(NO3)2 and NaF solutions were mixed such that [Ca2+] = 2.0 × 10−4 M, and [F] = 3.0 × 10−4 M?

1. no

2. yes, because Q is smaller than Ksp

3. yes, because Q is larger than Ksp

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Selective Precipitation concept. If you need more Selective Precipitation practice, you can also practice Selective Precipitation practice problems.

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Based on our data, we think this problem is relevant for Professor Costanza's class at USF.