A solution is 0.05 M in each of the anions fluoride (F–), carbonate (CO3 2-), and phosphate (PO4 3-) — Aqueous Chemistry Chemistry Question
Question
A solution is 0.05 M in each of the anions fluoride (F–), carbonate (CO3 2-), and phosphate (PO4 3-). As calcium ion is added slowly to this solution, in what order will the solids precipitate? The Ksp values are: CaF2, 3.9 × 10-11; CaCO3, 3.8 × 10-9; Ca3(PO4)2, 1.0 × 10-25.
A.
First CaF2, then CaCO3, then Ca3(PO4)2
B.✓ Correct
First CaF2, then Ca3(PO4)2, then CaCO3
C.
First Ca3(PO4)2, then CaF2, then CaCO3
D.
First Ca3(PO4)2, then CaCO3, then CaF2
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