高中化学课本第二册[实验2—5]电解食盐水实验,产生的氢气难以收集。我们对这个实验做了些改进,装置如右图。 1、烧杯内注入饱和食盐水溶液,溶液不要装得太满。 2、接通直流电源,电压为8—12伏特。 3、阳极产生的气体导入盛有碘化钾淀粉溶液的试管中,溶液变蓝,说明有氯气放出。阴极产生的气体用小试管收集点燃后发 High school chemistry textbook Volume 2 [Experiment 2-5] Electrolysis of salt water experiment, the hydrogen produced is difficult to collect. We have made some improvements to this experiment. The device is shown on the right. 1. Inject a saturated saline solution into the beaker. Do not overfill the solution. 2. Switch on the DC power supply with a voltage of 8-12 volts. 3. The gas generated from the anode is introduced into the test tube containing the potassium iodide starch solution. The solution turns blue, indicating the release of chlorine gas. The gas produced by the cathode is collected and ignited in a small test tube