小弟有幾條問題問大家:
1. Why don't we use gas stove for heating in laboratory?
2. Why do we should not oint the mouth of the test tube toward anyone
during heating?
3.What will happenif you squeeze the rubber tubing too much?
4.What happen if you hold the dropper upside down?
中一科學問題(IS高手請進)
2008-05-24 8:22 pm
回答 (1)
2008-05-24 9:39 pm
✔ 最佳答案
1. we only need to heat a small object such as test tube orbeaker. so we do not need a gas stove.
2. there may be some liquid spilling out during heating.
3. the liquid will go into the rubber tubing.
4. the liquid will go into the rubber tubing.
5. to prevent any contamination.
6. the excess liquid may be contaminated with some other
chemicals.
7. to transfer a little of liquid.
8. the test tube may touch each other. when the force is great,
the test tube will break.
收錄日期: 2021-04-16 15:07:49
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20080524000051KK01060