試題詳解

13. A 0.012-mol sample of Na:SO, is added to 400 mL of each of two solutions. One solution contains 1.5 x 103 M BaCh； the other contains for CaSO, = 6.1 x 10S. Which of the following statements is true?
(A) both BaSO₄, and CaSO₄ would precipitate
(B) not enough information is given to determine whether precipitation would occur
(C) CaSO₄ , would precipitate, but BaSO₄, would not
(D) BaSO₄, would precipitate but  CaSO₄  would not
(E) neither BaSO₄, nor  CaSO₄ , would precipitate.