What Is the Minimum Concentration of Br ^- Ions

question 202

Multiple Choice

What is the minimum concentration of Br ^- ions necessary to precipitate PbBr₂ from a 0.080 M Pb(NO₃) ₂ solution, if K _sp = 4.0×10 ^{- 5} for PbBr₂?

• A) 5.0×10 ^{- 4} M
• B) 0.022 M
• C) 6.3×10 ^{- 3} M
• D) 1.0×10 ^{- 5} M
• E) 0.080 M

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