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dui xin jiao cai zhong " yang qi zhi bei shi yan " de jiao xue si kao
Author(s): 
Pages: 15
Year: Issue:  11
Journal: Education in Chemistry

Abstract: "在现在人教社<新课标>九年级化学(2006版)第二单元"我们周围的空气"课题3"制取氧气"中.将实验室制取氧气的方法提供了三种:①用双氧水和二氧化锰混合制取氧气;②用氯酸钾和二氧化锰混合共热制取氧气;③单独加热高锰酸钾制取氧气.那么,教材中所提供的方法中.每一种方法的教学意图是什么?在教学中如何把握?这是教学过程中值得思考的问题.对此,笔者对每一种方法做了如下教学思考.……
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