What Is the Minimum Concentration of Pb²⁺ Required to Begin

question 10

Multiple Choice

What is the minimum concentration of Pb²⁺ required to begin precipitating Pb(OH) ₂(s) in a solution of pH 10.78? For Pb(OH) ₂,K_sp = 1.4 × 10^-20.

• A)3.0 × 10^-4 M
• B)8.4 × 10^-10 M
• C)2.3 × 10^-17 M
• D)3.9 × 10^-14 M
• E)1.2 × 10^-22 M

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