“氯碱工业”在国民经济中占有重要地位 ,它采用电解饱和食盐水的方法生产烧碱和氯气。在教学中 ,教师必须弄清决定电解产物的关键因素是什么以及为什么采用饱和食盐水进行电解这两个问题。对此 ,有的教学参考书认为“食盐水的浓度在确定产物方面起决定性作用” ,所以应采用饱 “Chlor-alkali industry” occupies an important position in the national economy. It uses electrolytic saturated brine to produce caustic soda and chlorine. In teaching, teachers must figure out what are the key factors that determine the electrolysis product and why it uses saturated brine for electrolysis. In this regard, some teaching reference books consider that “the concentration of salt water plays a decisive role in determining the product” and therefore should be used