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案例1分子运动实验分析和绿色化改进案例分析义务教育阶段九年级化学在研究分子运动实验时,主要通过浓氨水微粒运动能使酚酞溶液变红的实验,来体现分子的运动.教材主要内容如下:沪教版上册P63:观察与思考,实验一和实验二.实验1向烧杯A中加入20 mL蒸馏水,滴入2~3滴酚酞试液,得到溶液甲.向溶液甲中滴加1~2滴浓氨水,观察现象.这一实验现象说明什么?实验2在烧杯C中重新配制甲溶液.在烧杯B中加入3
Case 1 molecular movement experiment analysis and green improvement case analysis 9th grade compulsory education in the study of molecular motion experiments, mainly through concentrated ammonia water particle can make phenolphthalein solution reddish experiment, to reflect the movement of the molecule. : Shanghai Pinyin P63: observation and reflection, Experiment 1 and Experiment 2. Experiment 1 Add 20 mL of distilled water to a beaker A, dropping 2 to 3 drops of phenolphthalein test solution to give solution A. To the solution A dropping 1 ~ 2 drops of concentrated ammonia, observe the phenomenon What does this experimental phenomenon mean? Experiment 2 Reconstitute a solution in beaker C. Add 3