论文部分内容阅读
初中化学课本第105页,木炭吸附红墨水的红色染料实验,用小块木炭往往不易成功。如按下法改进,则效果甚好。 U形管底部装入并压紧经研细的木炭粉。在炭粉上放置一些直径3毫米左右的炭粒,最上面塞一团脱脂棉花,防止木炭上浮(如图)。稀释后的红色溶液(50毫升水加一滴红墨水)从右管倒入。几分钟后,澄清无色的液体就从左管棉花层上慢慢渗出。左右两管对比,现象十分明显。
In junior high school chemistry textbooks, page 105, charcoal adsorption red ink red dye experiment, with small pieces of charcoal is often not easy to succeed. If you follow the improvement, the effect is very good. The bottom of the U-shaped tube is loaded and pressed with finely ground charcoal powder. Put some carbon particles with a diameter of about 3 mm on the charcoal, and put a pack of skimmed cotton on top to prevent charcoal floating (see picture). The diluted red solution (50 ml of water plus one drop of red ink) was poured from the right tube. After a few minutes, the clear, colorless liquid slowly oozes out of the left tube cotton layer. The contrast between the two tubes is obvious.