A Solution Contains 0

Multiple Choice

A solution contains 0.021 mol L^-1 Cl⁻ and 0.017 mol L^-1 I⁻. A solution containing copper(I) ions is added to selectively precipitate one of the ions. At what concentration of copper(I) ion will a precipitate begin to form? What is the identity of the precipitate? K_sp(CuCl) = 1.0 × 10^-6, K_sp(CuI) = 5.1 × 10^-12.

A) 3.0 × 10^-10 mol L^-1, CuI
B) 3.0 × 10^-10 mol L^-1, CuCl
C) 4.8 × 10^-5 mol L^-1, CuCl
D) 4.8 × 10^-5 mol L^-1, CuI
E) 3.0 × 10^-5 mol L^-1, both CuCl and CuI are in the precipitate