论文部分内容阅读
一、探究“分子在不断运动”的实验改进改进后的实验装置如图1所示。1.实验器材:1个去底的无色可乐瓶、细铁丝、滤纸做成的纸花、称量瓶(也可用小药瓶代替)、酚酞、浓氨水。2.实验操作:(1)在可乐瓶盖上钻一个小眼儿。(2)在细铁丝上缠绕3～4朵滤纸做成的小花。(3)在小花
First, to explore “molecules in constant motion ” experimental improvement Improved experimental device shown in Figure 1. 1. Experimental equipment: a go to the end of the colorless cola bottle, thin wire, paper made of paper flowers, weighing bottles (also available small bottles instead), phenolphthalein, concentrated ammonia. 2. Experimental Operation: (1) Drill a small eye on Coke bottle cap. (2) 3 to 4 small flowers made of filter paper wound on a thin wire. (3) In the floret