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一、液体分子的扩散及扩散速度跟温度的关系以前我们演示液体分子的现象时,系将试管内先注入清水,用玻璃管吸入一段过锰酸钾溶液,小心的将玻璃管插入试管中,然后慢慢地将玻璃管取出,但插入和取出玻璃管时总不免有过锰酸钾溶液的痕迹停留在清水中,以致清水和过锰酸钾液层的界线不够明显。现在我们是这样作的:用两个短试管,先注入一半清水,用医生用的注射器吸入过锰酸钾溶液,吸入的量不可过多,只需注射器容积的二分之一左右,当针头从瓶中取出后,因为尚留有一些溶液,可先将针头外部拭干,再吸
First, the diffusion rate of liquid molecules and the relationship between diffusion speed and temperature Previously we demonstrated the phenomenon of liquid molecules, the Department of the first tube into the water, the glass tube inhalation period of potassium permanganate solution, the glass tube carefully inserted into the test tube, Then slowly remove the glass tube, but always can not help but insert and remove the glass tube traces of potassium permanganate solution stay in water, resulting in clear water and potassium permanganate liquid layer boundary is not clear enough. Now we do this: with two short test tubes, first half of the water injection, with a doctor with a syringe inhaled potassium permanganate solution, the amount of inhalation can not be excessive, only about one-half of the syringe volume, when the needle After removing from the bottle, because there are still some solution left, first external needle wipe dry, and then sucked