
20210710_高三化學_溶液
Quiz
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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10 questions
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1.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
在定溫下﹐甲﹑乙兩液體的飽和蒸氣壓分別為 250 mmHg 及 150 mmHg﹐且甲與乙混合形成理想溶液。將 0.30 莫耳之甲與一未知量之乙混合﹐當溶液達平衡時﹐蒸氣相中﹐甲與乙之分壓正好相等。則溶液中乙的莫耳數為何?(精確到小數第二位)
2.
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2 mins • 1 pt
20 °C 時﹐苯的飽和蒸氣壓為 75 mmHg﹐甲苯的飽和蒸氣壓為 22 mmHg。有一含苯 7.8 克與甲苯 9.2 克的混合溶液﹐達平衡時﹐將此溶液液面上之混合蒸氣取出冷卻在第二容器中﹐則在第二個容器中﹐苯的莫耳分率為何?(精確到小數第二位)
3.
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2 mins • 1 pt
在一個密閉的容器中放置甲﹑乙﹑丙三個燒瓶﹐其中甲加入 0.1 M 的尿素溶液 10 毫升﹐乙加入 0.2 M 的尿素溶液 10 毫升﹐丙加入 0.1 M 的尿素溶液 20 毫升。經長時間達成平衡後﹐乙燒瓶中尿素溶液的體積為多少毫升?
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
苯﹑醋酸﹑氯仿和樟腦的莫耳凝固點下降常數分別為 5.12﹑4.7﹑7.3 和 40.0﹐若某溶質均能溶於上述四種溶劑﹐在凝固點下降的實驗﹐你將選用何種溶劑為最佳?
苯
醋酸
氯仿
樟腦
小孩子才做選擇,我全都要!
5.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
下圖為 C10H8 溶於某溶劑所成溶液之沸點與其重量莫耳濃度 m 之關係圖﹐則沸點為 83 °C 的該溶液 100 克中含有 C10H8 若干克?(精確到小數點第一位)
6.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
需多少克蔗糖加到 100 克水中﹐才能使所形成之溶液的凝固點與沸點相差 105.0 °C?
7.
FILL IN THE BLANK QUESTION
2 mins • 1 pt
某有機化合物為非揮發性的非電解質﹐1% 的此水溶液之凝固點為-0.104 °C﹐該有機化合物之分子量為何?
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