
三、水溶液(活動1 溶解現象)
Quiz
•
Chemistry
•
5th Grade
•
Practice Problem
•
Easy
育碩 胡
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50 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
物質溶解在水中後,就消失不見了,所以我們無法利用任何方法再將物質取回。
2.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
在30毫升的水中加入5克重的食鹽後,食鹽水溶液的水位高度上升了,可以說明食鹽仍在水中並沒有消失不見。
3.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
食鹽溶解在水中後,顆粒慢慢消失不見,但我們可以從重量及水位高度的變化,知道食鹽仍然還存在水中。
4.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
進行「溶解後水溶液的重量」實驗時,利用磅秤可以測量溶質加入水中溶解前、後的重量。
5.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
進行「溶解後水溶液的重量」實驗後,可以得知「物質溶解在水中後,燒杯內的水位會上升,水溶液的重量會增加」。
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
我們可以將實驗用過的食鹽水溶液放在通風處,過幾天後,水分蒸發了,食鹽又變回顆粒狀。
7.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
實驗過後的食鹽水溶液可以用濾紙過濾的方式,將溶解在水中的食鹽過濾回收。
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