论文部分内容阅读
为加强直观教学,提高教学效果,我用石蜡制作了一些分子(晶体)的结构模型,做法如下:1.用直径为2.5mm 的铁丝按分子(晶体)的空间结构扎好框架。如石墨晶体的框架是根据高二化学(甲种本)第二册第14页图1-7,先扎好三个边长为142 mm(键长的10~9倍)的彼此相联的平面六边形,再用335mm(层间距的10~9倍)长的铁丝将二个平面结构联成网状结构。2.石蜡的软化:将石蜡放入蒸发皿(烧杯)中加热至熔化,再冷至软蜡状(面团状),这样得到的石蜡软化均匀,易于作蜡球;或将要软化的石蜡放于烧杯中,再将烧杯置于50～60℃的恒温箱中,约半小时即可作蜡球。(如要制作不同颜色的蜡球,可在熔化的
In order to strengthen the intuitive teaching and improve the teaching effect, I made some molecular (crystal) structural models using paraffin. The practice is as follows: 1. Using a 2.5 mm diameter wire to tie the frame in the spatial structure of the molecules (crystals). For example, the framework of the graphite crystal is based on the Figure 1-7 on page 14 of the second book of the High II Chemistry (first edition). First, three planes with a side length of 142 mm (10 to 9 times the bond length) are attached to each other. Hexagons, and then use 335mm (10 to 9 times the interval) long wire to connect the two planar structure into a network structure. 2. Paraffin softening: Paraffin is placed in an evaporating dish (beaker) and heated to melt, and then cooled to a soft waxy (dough) shape. The resulting paraffin wax is softened to make it easy to be a wax ball; or the paraffin to be softened is put on In a beaker, the beaker is placed in an incubator at 50-60°C, and the wax ball can be made in about half an hour. (If you want to make different colors of wax balls, you can melt them.