問題詳情
28. 某溫度下,固體溶質甲之溶解度曲線如圖(此圖形不是從原點開始), 則下列何項正確?
(A)溶液 P 之重量百分率濃度為 60.0%
(B)40℃時,20 克溶質甲中加入 30 克水可將溶質甲完全溶解
(C)取 1100 g 之溶液 S 冷卻到 40°C,可析出溶質甲 360 g
(D)欲使溶液 Q 在 70℃時達飽和,每千克溶液 Q 需再加入溶質甲 187.5 g
(E)將溶液 Q 由 70℃降溫至低於 40℃即有溶質甲晶體析出。
(A)溶液 P 之重量百分率濃度為 60.0%
(B)40℃時,20 克溶質甲中加入 30 克水可將溶質甲完全溶解
(C)取 1100 g 之溶液 S 冷卻到 40°C,可析出溶質甲 360 g
(D)欲使溶液 Q 在 70℃時達飽和,每千克溶液 Q 需再加入溶質甲 187.5 g
(E)將溶液 Q 由 70℃降溫至低於 40℃即有溶質甲晶體析出。

參考答案
答案:D,E
難度:適中0.4
統計:A(1),B(0),C(0),D(3),E(5)
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