一、试题 1及分析在图 1所示的实验装置中 ,Ｅ为一张用淀粉、碘经钾和酚酞混合溶液润湿的滤纸 ,Ｃ ,Ｄ为夹在滤纸两端的铂夹 ,ｘ ,ｙ分别为直流电源的两极。在Ａ ,Ｂ中充满ＫＯＨ溶液后倒立于盛有ＫＯＨ溶液的水槽中 ,再分别插入铂电极。切断电源开关Ｓ1 ,合闭开关Ｓ2 ,通直流 First, test 1 and analysis In the experimental device shown in Figure 1, E is a filter paper moistened with a mixture of starch, potassium iodine and phenolphthalein, C, D is a platinum clip sandwiched between the ends of the filter paper, x, y They are the two poles of the DC power supply. After A and B were filled with KOH solution, they were inverted in a water bath containing KOH solution and platinum electrodes were inserted separately. Cut off the power switch S1, close the switch S2, pass the DC