問題詳情
22. 於 U 形管中，電解 0.5M KI(aq)，下列敘述何者正確？
(A)陰極產生氫氣
(B)陰極附近呈鹼性，加入酚酞呈紅色
(C)吸取陽極附近之溶液加入 CCl4(l)振盪，在 CCl4(s)層中呈紫色
(D)通入 2 安培電流，經 4825 秒後，理論上即可乾燥氧氣 1.6 克
(E)取陰極溶液 1ml，加入數滴 FeCl3(aq)，則有沉澱產生。
(A)陰極產生氫氣
(B)陰極附近呈鹼性，加入酚酞呈紅色
(C)吸取陽極附近之溶液加入 CCl4(l)振盪，在 CCl4(s)層中呈紫色
(D)通入 2 安培電流，經 4825 秒後，理論上即可乾燥氧氣 1.6 克
(E)取陰極溶液 1ml，加入數滴 FeCl3(aq)，則有沉澱產生。
參考答案
答案：A,B,C,E
難度：適中0.5
統計：A(0),B(0),C(0),D(0),E(0)
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