初中一册物理课本中的液体间扩散现象实验,是用小漏斗向水中加硫酸铜溶液,由于小漏斗管颈中有空气,且液位差较大,因而在加液时易产生气泡,造成加液后两液体界面不清晰。另外此实验要静置较长时间才能观察到结果,这就不利于在一节课时间内得出结论。鉴于上述原因,我们对此实验作了如下改进。 Middle school physics textbooks in a liquid diffusion phenomenon experiment is to use a small funnel to the water with copper sulfate solution, due to the small funnel neck air, and the liquid level difference is large, so easy to produce bubbles in the dosing, resulting in After adding liquid two liquid interface is not clear. In addition, this experiment should be allowed to stand a long time to observe the results, which is not conducive to conclusions in a class time. In view of the above reasons, we made the following improvements to this experiment.