论文部分内容阅读
取容积为100毫升的园底烧瓶一只,配上适当的胶塞。在胶塞上装配一支尖咀玻璃管;并使玻璃管伸及园底烧瓶底部附近。 向烧瓶中加入50～60毫升酒精。向酒精中滴入几滴红墨水,振荡,使成红水酒精,以增加喷泉的鲜明程度。然后将瓶塞塞紧,勿使壁部漏气。 演示操作。(1)向容积为500毫升的烧杯中加水200～250毫升,再用量简量取55～60毫升浓硫酸,沿烧杯壁部徐徐倾入水中,边倾入边搅拌。(2)将装有红色酒精的园底烧瓶放入
Take a 100 ml round-bottomed flask and add a suitable rubber stopper. Fit a truncated glass tube over the stopper and extend the glass tube near the bottom of the flask. Add 50 to 60 ml of alcohol to the flask. Drop a few drops of red ink into the alcohol and oscillate it into red water to increase the clarity of the fountain. Then plug the stopper tightly so that the wall does not leak. Demonstration operation. (1) Add 200-250 ml of water to a beaker with a volume of 500 ml, and then use a simple amount of 55-60 ml of concentrated sulfuric acid. Slowly pour into the water along the beaker’s wall and pour it in while stirring. (2) Put a round bottom flask containing red alcohol