問題詳情
10. 以二鉻酸鉀滴定未知濃度的亞鐵離子酸性水溶液時，常以二苯胺磺酸鈉作為指示劑。其中，二苯胺磺酸根離子作為指示劑的變色原理如下式所示： 
在此條件下，下列有關（甲）鉻離子、（乙）亞鐵離子與（丙）二苯胺磺酸根離子之間還原力的比較，哪一項正確？
(A)甲＞乙＞丙
(B)乙＞丙＞甲
(C)丙＞甲＞乙
(D)丙＞乙＞甲
(E)乙＞甲＞丙
在此條件下，下列有關（甲）鉻離子、（乙）亞鐵離子與（丙）二苯胺磺酸根離子之間還原力的比較，哪一項正確？(A)甲＞乙＞丙
(B)乙＞丙＞甲
(C)丙＞甲＞乙
(D)丙＞乙＞甲
(E)乙＞甲＞丙
參考答案
答案：B
難度：困難0.314286
統計：A(4),B(11),C(3),D(3),E(5)
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