在新课程苏教版高一“化学1—氯气的生产原理”第38页“观察与思考”中,对电解饱和食盐水的实验表述如下(装置见图1):1.接通电源.铁棒饱和食盐水图1 氢氧化钠溶液原实验装置观察U形管内的变化。 2.通电一段时间后,用小试管套住a管,收集U形管左端产生的气体。Zm In the new curriculum Sujiao version of a “chemistry 1-chlorine production principle ” page 38 “observation and thinking ”, the experiment of electrolytic saturated brine is as follows (device shown in Figure 1): 1 Power supply. Iron rod saturated salt water Figure 1 sodium hydroxide solution of the original experimental device to observe changes in the U-shaped tube. 2. Power for some time, a tube with a small test tube, collect the left side of the U-shaped tube generated gas. Zm