The Concentration of Pb²⁺ in an Aqueous Solution Is 5

Multiple Choice

The concentration of Pb²⁺ in an aqueous solution is 5.5 × 10^-3 M.What concentration of SO₄^2- is required to begin precipitating PbSO₄? The K_sp of PbSO₄ is 2.5 × 10^-8.

A) 1.4 × 10^-10 M
B) 4.5 × 10^-6 M
C) 1.6 × 10^-4 M
D) 8.3 × 10^-4 M
E) 2.9 × 10^-2 M