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一、实验改进目的本实验改进达到以下目的:①简化实验装置;②强化喷射现象;③消除吸滤瓶发生爆炸的危险。二、实验仪器及用品打有小孔的塑料矿泉水瓶1个、长小试管1支、胶头滴管;浓盐酸、浓Na_2CO_3溶液。三、实验装置实验装置见图1。四、实验操作1.往矿泉水瓶中注入约半瓶浓Na_2CO_3溶液。2.小心将长小试管放入矿泉水瓶中,用胶头滴管吸取两滴管浓盐酸注入小试管内。
First, the purpose of experimental improvement The experiment to achieve the following objectives: ① simplify the experimental device; ② strengthen the phenomenon of injection; ③ eliminate the suction flask explosion danger. Second, the experimental apparatus and supplies Hit a hole in a plastic mineral water bottle, a long test tube, plastic head dropper; concentrated hydrochloric acid, concentrated Na_2CO_3 solution. Third, the experimental device Experimental device shown in Figure 1. Fourth, the experimental operation 1. To the mineral water bottle into about half a bottle of concentrated Na_2CO_3 solution. 2. Carefully put a long test tube into a mineral water bottle and use a plastic tip pipette to pipette two drops of concentrated hydrochloric acid into a small test tube.