問題詳情
題組: ＜實驗三＞以0.010 M的酸性過錳酸鉀溶液滴定25.0 mL飽和草酸鎂溶液，達滴定終點時共耗去過錳酸鉀溶液10.0 mL。根據上述，試回答6~7題：
6.下列何種變化，可指示本實驗已達滴定終點?
(A)紫紅色不再消失
(B)開始生成氣泡
(C)血紅色沉澱出現
(D)紫紅色消失
(E)因為未加入指示劑，故沒有顏色的變化
6.下列何種變化，可指示本實驗已達滴定終點?
(A)紫紅色不再消失
(B)開始生成氣泡
(C)血紅色沉澱出現
(D)紫紅色消失
(E)因為未加入指示劑，故沒有顏色的變化
參考答案
答案：A
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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