Use K_sp values to decide which compound in each of the following pairs is more soluble. (Appendix J.)
(a) AgBr or AgSCN
(b) SrCO₃ or SrSO₄
(c) AgI or PbI₂
(d) MgF₂ or CaF₂

Data given in Appendix J

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TABLE 18A Solubility Product Constants at 25 °C Cation Compound Cation Ba²+ *BaCrO Hg₂²+ 2+ BaCO3 BaF₂ *BaSO4 Ca²+ Cut, Cu²+ Au+ Fe²+ Pb²+ Mg²+ Mn²+ CaCO3 (calcite) *CaF2 *Ca(OH)2 CaSO4 CuBr Cul Cu(OH)2 CuSCN AuCl FeCO3 Fe(OH)2 PbBr₂ PbCO3 PbCl₂ PbCrO₁ PbF2 Pbl₂ Pb(OH)2 PbSO4 MgCO3 MgF2 Mg(OH)2 MnCO3 *Mn(OH)2 Ksp 1.2 x 10-10 2.6 × 10-9 1.8 x 10-7 1.1 x 10-10 3.4 x 10-9 5.3 x 10-11 5.5 x 10-5 4.9 x 10-5 6.3 x 10-9 1.3 x 10-12 2.2 x 10-20 1.8 x 10-13 2.0 x 10-13 3.1 x 10-11 4.9 × 10-17 6.6 x 10-6 7.4 x 10-14 1.7 x 10-5 2.8 x 10-13 -13 3.3 x 10-8 9.8 x 10-9 1.4 x 10-15 2.5 x 10-8 6.8 x 10-6 5.2 x 10-11 5.6 x 10-12 2.3 × 10-11 1.9 x 10-13 Ni²+ Ag+ Sr²+ TI+ Zn²+ Compound *Hg₂Br₂ Hg₂Cl₂ *Hg2l2 Hg2SO4 NICO3 Ni(OH)2 *AgBr *AgBrO3 AgCH3CO₂ AgCN Ag₂CO3 *Ag₂C₂04 *AgCl Ag₂ CrO4 *Agl AgSCN *Ag₂SO4 SrCO3 SrF₂ SrSO4 TIBr TICI TII Zn(OH)₂ Zn(CN)₂ Ksp 6.4 x 10-23 1.4 x 10-18 2.9 x 10-29 6.5 x 10-7 1.4 x 10-7 5.5 x 10-16 5.4 x 10-13 5.4 x 10-5 1.9 x 10-3 6.0 x 10-17 8.5 x 10-12 5.4 x 10-12 1.8 x 10-10 1.1 x 10-12 8.5 x 10-17 1.0 x 10-12 1.2 x 10-5 5.6 x 10-10 4.3 × 10-9 3.4 x 10-7 3.7 x 10-6 1.9 x 10-4 5.5 x 10-8 3 x 10-17 8.0 x 10-12