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ji yu cui hua ji you ji yang hua fan ying gai nian jian gou de yi chun yang hua shi yan gai jin
Author(s): 
Pages: 65-67
Year: Issue:  1
Journal: Education in Chemistry

Keyword:  乙醇氧化催化剂有机氧化反应实验改进概念建构;
Abstract: 为了给催化剂、有机氧化反应概念的建构提供实验支持,对乙醇氧化制乙醛实验进行改进.将氧气和乙醇蒸气交替通过催化剂,使催化剂(铜)变黑、变亮的实验现象交替出现,便于学生观察,为催化剂参与化学反应的观念建构提供实证支撑;将乙醇蒸气通过催化剂,为建构有机氧化反应概念——得氧失氢的核心理念提供实验支持;将乙醛制备和检验同时进行,节省了实验时间,有利于课堂演示和分组实验.
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