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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
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
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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【題組】49. According to this passage, which of the following statements is TRUE?(A) Company workers sta
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