我们会做试验了Interesting experiment, reporting
The simple experiment for salt crystallizatio
进行趣味实验，写出实验报告或实验过程
盐结晶实验
实验地点：西宁市南方小学
辅导老师：叶老师
实验原理：液体盐通过加温蒸发形成结晶盐
实验步骤：
第一步：将液体盐放入烧杯
第二步：酒精炉加热
第三步：蒸发
第四步：形成结晶盐
实验结论：
这次试验使我们明白了盐是怎样结晶的，并且通过辅导老师的介绍，了解了盐的其他结晶方法，古老的方法有设泥灶，用铁盘或铁锅注卤水加热，将皂角末和半糠搅沸卤中，顷刻成盐的煎煮法。
IV. Results
The process of salt crystallization can be understood when the experiment is completed successfully.
The Experiment Site: The Nanfang Primary School of Xining City
The Coaching Teacher: Ms. Ye
The Experimental Theory: The crystallized salt is formed through the vaporization of liquid salt when heated.
Steps:
Step 1: To pour the liquid salt into the beaker
Step 2: To heat it with the spirit lamp
Step 3: To vaporize it
Step 4: To form salt crystals
Conclusion:
We could understand how salt is crystallized through the experiment and learn of some other salt crystallization methods from our teacher’s introduction such as the boiling method adopted in ancient times that people poured brine water into an iron tray or pan and heated it with a stove built with mud and put some soapbark powder and half-chaff into the boiling brine water and the salt was formed instantly.
May. 02, 2009
I. Experimental Objective:
Self-making crystals and watching the crystallization process
II. Devices
1. a spirit lamp
2. a vessel
3. a bracket
4. an asbestos net
5. a small bowl
III. Steps:
Step 1: To hold 100 mm of water in the vessel
Step 2: To lighten the spirit lamp, pour some water into the small bowl and put some salt in it, let the salt be solved into the water. The salt crystals will be left in the small bowl when the water is all vaporized by heating.
IV. Results
The process of salt crystallization can be understood when the experiment is completed successfully.
May. 01, 2009
The Experimental Report
My classmates and I went to the Nanfang Primary School to do an interesting experiment on salt on a fine day.
As soon as we were seated, an amiable teacher came over and grouped us and then we started to do our experiments under the teacher's instruction. At first, it was necessary for us to prepare burettes, spirit lamps, asbestos nets, tripods, vaporizing utensils, salt water, test tubes, glass bars, beakers and NaCl solvent.
We did our experiments step by step according to our teacher but we failed. We only saw steam rising from the salt water in the utensil without a single bubble and our teacher explained it was due to too much water we had poured in, so we had to give up the experiment. Then, our teacher took up the NaCl solvent with one hand and held the test tube holding the salt water with another and dipped some NaCl solvent into the tube and white sediments appeared. Oh, we were amazed that the white sediments was salt crystals.
We get to know from this experiment that natural science exists not only in the flora and fauna but also probably around us.
May. 01, 2009