A Solution Is Prepared Such That the Concentrations of the Ions

question 75

Multiple Choice

A solution is prepared such that the concentrations of the ions F ^- , Cl ^- , Br ^- , and I ^- are all 0.0010 M . Solid Pb(NO₃) ₂ is added to the solution. Which insoluble lead salt precipitates last?
PbF₂ K _sp = 3.7×10 ^{- 8} PbCl₂ K _sp = 1.7×10 ^{- 5} PbBr₂ K _sp = 6.3×10 ^{- 6} PbI₂ K _sp = 8.7×10 ^{- 9}

• A) PbI₂
• B) PbBr₂
• C) PbCl₂
• D) PbF₂
• E) impossible to determine

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