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Calculate the Minimum Concentration of Mg2+ That Must Be Added

Question 6

Multiple Choice

Calculate the minimum concentration of Mg2+ that must be added to 0.10 M NaF in order to initiate a precipitate of magnesium fluoride. (For MgF2 , Ksp = 6.9 * 10-9.)


A) 1.4 * 107 M
B) 6.9 * 10-9 M
C) 6.9 * 10-8 M
D) 1.7 * 10-7 M
E) 6.9 * 10-7 M

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