1. You have a solution containing Ca²+ and Ba²+ ions, both at 0.10 M. You wish to separate the two ions from each other by precipitating one but not the other using NaF as the precipitating agent. Kap(CaF₂) = 3.9*10-11, Kap(BaF2) = 1.7*10-6. a. Which precipitates first as sodium fluoride is added, CaF₂ or BaF₂? b. What is the concentration of the first ion that precipitates (Ca²+ or Ba²+) when the second, more soluble salt begins to precipitate?

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Part II: Short Answer / Calculation,
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1. You have a solution containing Ca²+ and Ba²+ ions, both at 0.10 M. You wish to separate the two ions from each other by
precipitating one but not the other using NaF as the precipitating agent. Ksp(CaF₂) = 3.9*10-11, Ksp(BaF2) = 1.7*106.
a. Which precipitates first as sodium fluoride is added, CaF₂ or BaF₂?
b. What is the concentration of the first ion that precipitates (Ca²+ or Ba2+) when the second, more soluble salt begins to
precipitate?
Transcribed Image Text:Part II: Short Answer / Calculation, Show all work! 1. You have a solution containing Ca²+ and Ba²+ ions, both at 0.10 M. You wish to separate the two ions from each other by precipitating one but not the other using NaF as the precipitating agent. Ksp(CaF₂) = 3.9*10-11, Ksp(BaF2) = 1.7*106. a. Which precipitates first as sodium fluoride is added, CaF₂ or BaF₂? b. What is the concentration of the first ion that precipitates (Ca²+ or Ba2+) when the second, more soluble salt begins to precipitate?
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