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仁爱版九年级化学教材上册第56页“探究微粒运动的实验”中采用了浓氨水和无色酚酞试液2种试剂。具体实验过程如下:向烧杯A中加入20mL蒸馏水,滴入2-3滴酚酞试液。在烧杯B中加入3-5mL浓氨水,用1个大烧杯把A,B两烧杯的溶液罩在一起(图1),观察现象。浓氨水具有强烈的氨臭味,实验中虽然使用到的浓氨水不多,但往往还是弄得教室里臭味四溢,且该实验基本上只能作为演示实验,很难作为学生分组实验。
Renyin edition ninth grade chemistry textbook on the first page 56 “to explore the experiment of particle movement ” in the concentration of ammonia and colorless phenolphthalein test solution 2 reagents. The specific experimental process is as follows: To a beaker A 20mL distilled water, dropping 2-3 drops of phenolphthalein test solution. In a beaker B 3-5mL concentrated ammonia, with a large beaker A, B two beaker solution together (Figure 1) observed the phenomenon. Concentrated ammonia has a strong odor of ammonia odor. Although only a few concentrated ammonia is used in the experiment, it often causes the classroom to smell badly. The experiment basically can only serve as a demonstration experiment and can hardly be grouped as students.