Rank the following sparingly soluble chlorides in order of decreasing molar solubility when each is placed in 0.10 M NaCl(aq) at 25 °C (most soluble → least soluble): AgCl (Ksp=1.8×10−10), PbCl₂ (Ksp=1.7×10−5), Hg₂Cl₂ (Ksp=1.1×10−18). Provide the ranking and a concise justification that refers to both Ksp and stoichiometry.