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If 15.0 mL of 5.92×10-4 M MgI2 are added to 12.0 mL of 5.60×10-5 M NaF,...

If 15.0 mL of 5.92×10-4 M MgI2 are added to 12.0 mL of 5.60×10-5 M NaF, will solid MgF2 (Ksp = 6.4×10-9) precipitate?   _____yesno

If a precipitate will not form, what fluoride ion concentration will cause a precipitate of magnesium fluoride to form? If a precipitate will form, what is the minimum [F-] that could have been present without initiating precipitation? Assume the total volume used in the above example.

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Answer #1

If solid Mg F2 precipitate the it will follow do ksi [ngth} CE-22 > 0.4x109 frog 12) = 7545 G4Xtory - 89.1 X1o-> 15 +)2 97 3-IF > 579,38164 TFT 1.28 X10-3 m for ppt. If ppt will not form then - Q<kspo - [F] < 1.28X103 m

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