H-shaped test tube for demonstrating chemical experiment in middle school

The utility model belongs to the field of middle school chemistry teaching, and provides an H-shaped test tube for demonstrating a middle school chemistry experiment, which is characterized by comprising an H-shaped test tube (1), calcium oxide (2), stronger ammonia water (3), a first injector (4), a second injector (5), an air pressure buffer device (6), concentrated hydrochloric acid (7), anhydrous calcium chloride (8), water (9), sodium (10), a pin (11), a conduit (12) and absolute ethyl alcohol (13). Through assembly, the device can be used for demonstrating the reaction of ammonia gas and hydrogen chloride, the contrast experiment of the reaction of sodium and water and the reaction of sodium and ethanol and the similar experiment, and the sealing, greening and miniaturization of the device can be realized in the experiment process. 本装置属于中学化学教学领域，提供了一种用于演示中学化学实验的H形试管，其特征是：它由H形试管(1)、氧化钙(2)、浓氨水(3)、第一注射器(4)、第二注射器(5)、气压缓冲装置(6)、浓盐酸(7)、无水氯化钙(8)、水(9)、钠(10)、大头针(11)、导管(12)、无水乙醇(13)组成。通过组装可用于演示氨气和氯化氢的反应、钠和水及钠和乙醇反应