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1 Na2 CO3 和NaHCO3 与稀盐酸反应的对比实验 教材中该实验采用试管和气球装药品,实验时需用手将气球中的固体药品倒入试管,这种设计存在两大弊病:一是气球中的药品不易倒干净;二是两个实验不易同种操作。可作如下改进:图1 Na2 CO3、NaHCO3与稀盐酸的反应 先将两种反应
1 Comparison of Na2CO3 and NaHCO3 with Dilute Hydrochloric Acid in Comparative Experiments This experiment uses test tubes and balloons to load medicines. During the experiment, the solid medicine in the balloon needs to be poured into the test tube manually. This design has two major drawbacks: First, the balloon The drugs are not easy to clean; the second is that the two experiments are not easy to the same kind of operation. The following improvements can be made: Figure 1 Reaction of Na2 CO3, NaHCO3 and dilute hydrochloric acid