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本文中创新设计实验装置新颖简单,试剂用量少,实验操作简便,污染极少,安全性好,实验现象非常明显,可应用于教师演示实验,也可用于学生实验。一、实验仪器特型四角管、双孔胶塞(含导管气球,注射器针头连接细管)、注射器。二、实验试剂Na_2SO_3(固体)、稀硫酸、品红溶液、酸性高锰酸钾溶液、溴水、紫色石蕊试纸。三、实验装置实验装置如附图所示。四、实验操作在特型四角管的一管中装入少量Na_2SO_3固体,然后用三个注射器(针头部分连接长的细管),分别加入品红溶液、酸性高锰酸钾溶液、溴水于另外三个管中(可以增加从管口伸入紫
In this paper, the innovative design of the experimental device is simple, less reagent, experimental operation is simple, minimal pollution, safety, experimental phenomenon is very obvious, can be used in teacher demonstration experiments can also be used for student experiments. First, the experimental apparatus Special-shaped square tube, double-hole rubber stopper (including catheter balloon, syringe needle connection thin tube), syringe. Second, the experimental reagents Na_2SO_3 (solid), dilute sulfuric acid, magenta solution, acid potassium permanganate solution, bromine water, purple litmus paper. Third, the experimental device Experimental device as shown in the figure. Fourth, the experimental operation In a special square tube into a small amount of Na_2SO_3 solids, and then use three syringes (long needle connected to the long tube) were added to the magenta solution, acid solution of potassium permanganate, bromine in water In the other three tubes (which can increase the penetration of purple from the nozzle