初中化学教材“木炭吸附性”演示实验二，如按教材要求进行，投入木炭块状过大，脱色不明显；木炭过碎，脱色显著，但造成溶液混浊，不便观察。因此为达到实验教学的目标，充分发挥教材的育人功能，我们制作了一个简易的净水器。现介绍如下。１实验用品矿泉水或纯净水瓶１个、? Junior middle school chemistry textbook “charcoal adsorption” demonstration experiment II, such as according to the requirements of teaching materials, input charcoal massive large, decolorization is not obvious; charcoal excessive fragmentation, decolorization significantly, but the resulting solution turbidity, inconvenience to observe. Therefore, in order to achieve the goal of experimental teaching and give full play to the educational function of the teaching materials, we have created a simple water purifier. The introduction is as follows. 1 experimental supplies mineral water or pure water bottle 1,?