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一、实验装置(见下图)二、操作方法1.如图示,在具支试管 A 内放入锌粒3 g,B 中放入固体高锰酸钾4g;在分液漏斗中盛有浓盐酸20ml,储气瓶中注满了氯化钠的饱和溶液。2.打开止水夹,然后开启分液漏斗,使浓盐酸逐滴加入试管 B,产生的氯气通过具支导管进入试管 A,待试管 A 呈现黄绿色时,打开储气瓶上的开关,关闭分液漏斗和止水夹。3.迅速给试管 A 内加入6 mol L~(-1)稀盐酸2 ml,重新盖好塑料片。当产生的氢气上升到试管 A 的顶端时,点燃一条约10cm 长的镁带,
First, the experimental device (see below) Second, the operation method 1. As shown in the figure, in a test tube A into the zinc particles 3 g, B into the solid potassium permanganate 4g; in the separation funnel Concentrated hydrochloric acid 20ml, gas cylinder filled with a saturated solution of sodium chloride. 2. Open the water stop clamp, then open the separatory funnel, and add concentrated hydrochloric acid dropwise to the test tube B. The generated chlorine gas enters the test tube A through the branch tube. When the test tube A turns yellowish green, the switch on the gas storage bottle is opened and closed. Separating funnel and sealing clip. 3. Quickly add 2 ml of dilute hydrochloric acid (6 mol L-1) to test tube A and cover the plastics again. When the hydrogen gas produced rises to the top of test tube A, it ignites a treaty with a 10cm long magnesium tape.