試題詳解

19. Which of the following substances does not show increased solubility as the pH of the solution becomes more acidic?
(A) Hg₂Cl₂, K_sp = 1.1 × 10^-18 (Hg₂²⁺ is the cation in solution.)
(B) Ag₃PO₄, K_sp = 1.8 × 10^-18
(C) CaCO₃, K_sp = 8.7 × 10^-9
(D) CdCO₃, K_sp = 5.2 × 10^-12
(E) Sr₃(PO₄)₂, K_sp = 1.0 × 10^-31