問題詳情

7. A solution contains the ions

. Dilute solutions of NaCl,

, and Na2S areavailable to separate the positive ions from each other. In order to effect separation, the solutionsshould be added in which order?
(A) Na2SO4, NaCl, Na2S
(B) Na2SO4, Na2S, NaCl
(C) Na2S, NaCl, Na2SO4
(D) NaCl, Na2S, Na2SO4
(E) NaCl, Na2SO4, Na2S

參考答案

答案：A
難度：計算中-1
書單：沒有書單，新增