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为了解决在化学反应中需要同时、等量的加料问题,我们制作了以下两种教具。一、“化学反应速度演示实验装置”该装置分为三个部分(装置如图1): 1、同时、等量加料部分按图制作木架,将四支同型号试管用氢氟酸画上刻度,固定于活动板中;转动旋钮,四支试管中的反应物就同时加料。 2、接受部分及放大部分木架底板上,在与活动板中四支试管位置对应处挖四个与250毫升烧杯吻合的圆槽,把烧杯固定在底板
In order to solve the problem of simultaneous and equal feeding in chemical reactions, we have produced the following two kinds of teaching aids. First, the “chemical reaction speed demonstration experimental device” The device is divided into three parts (device shown in Figure 1): 1, at the same time, the same amount of feeding parts according to plans to make wooden frame, the four models with the same type of test tube with hydrofluoric acid The scale is fixed in the movable plate; turn the knob and the reactants in the four tubes are fed simultaneously. 2. On the bottom plate of the receiving part and the enlarged part, dig four circular grooves matching the 250 ml beaker at the positions corresponding to the four test tubes in the movable plate, and fix the beaker on the bottom plate.