1.) Which of the following metal fluorides is the least soluble in water. MgF 2

Question

1.) Which of the following metal fluorides is the least soluble in water.

                        MgF2               Ksp=6.6x10-9   

                        CaF2                Ksp=3.9x10-11

                       BaF2                Ksp=1.7x10-6

                        PbF2                Ksp=3.6x10-8

A. MgF2 B. CaF2 C.   BaF2 D.   PbF2 E. The solubilities cannot be determined from the information provided


2.) Calculate the solubility of lead iodide (Ksp=8.7x10-9) in 0,10 M NaI solution.

A. 8.7x10-11 B. 8.7x10-9 C. 4.4x10-8 D. 8.7x10-8 E. 8.7x10-7

Explanation / Answer

Ksp value is less solubility is less

B. CaF2

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