What Is the Concentration of Pb 2+ Ions in a Solution

question 24

Multiple Choice

What is the concentration of Pb 2+ ions in a solution resulting from the addition of 1.0 10 - 3 moles of Na₂ CrO₄ to 1.0 liter of solution containing solid PbCrO₄ ( K sp = 1.8*10^{- 14} ) in equilibrium with its ions?
(Assume no volume change on addition of Na₂ CrO₄ .) PbCrO₄ (s) Pb 2+ (aq) + CrO₂ - (aq)

• A) 1.8×10 ^{- 17} M
• B) 1.34×10 ^{- 7} M
• C) 1.0×10 ^{- 3} M
• D) 1.34×10 ^{- 10} M
• E) 1.8×10 ^{- 11} M

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