試題詳解

10. To a solution that is 0.01 M each in fluoride, sulfite, and phosphate ions is added dropwise a 1.00 M solution of CaCl₂. In what order will solids precipitate?

(A) First Ca₃(PO₄)₂, then CaF₂, last CaSO₃
(B) First Ca₃(PO₄)₂, then CaSO₃, last CaF₂
(C) First CaSO₃, then, CaF₂, last Ca₃(PO₄)₂
(D) First CaF₂, then CaSO₃, last Ca₃(PO₄)₂
(E) First CaF₂, then Ca₃(PO₄)₂, last CaSO₃