Which of the Following Solids Will Provide the Greatest Concentration

Which of the following solids will provide the greatest concentration of Cl^{1 −} ions if one mole of the salt is placed in one liter of deionized water?

A) AgCl( s ) Ag¹⁺( aq ) + Cl^{1 −} ( aq ) K_sp = 1.8 × 10 ^{− 10}
B) PbCl₂( s ) Pb²⁺( aq ) + 2 Cl^{1 −} ( aq ) K_sp = 1.75 × 10 ^{− 5}
C) Hg₂Cl₂( s ) 2 Hg¹⁺( aq ) + 2 Cl^{1 −} ( aq ) K_sp = 1.1 × 10 ^{− 18}
D) NaCl( s ) → Na¹⁺( aq ) + Cl^{1 −} ( aq )