What Molar Concentration of Silver Ion Could Exist in a Solution

Multiple Choice

What molar concentration of silver ion could exist in a solution in which the concentration of CrO₄^2- is 1.0 × 10^-4 M? (Ksp of Ag₂CrO₄ = 1.1 × 10^-12)

A) 9.0 × 10^-8 M
B) 4.5 × 10^-3 M
C) 1.0 × 10^-4 M
D) 2.1 × 10^-4 M
E) 7.5 × 10^-5 M