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铝在常温下易受空气氧化,能置换冷水中的氢,但由於铝表面上易生成一层紧密的氧化铝薄膜,对於内部的铝起着保证作用,所以铝不再受氧化也不再和水作用。怎样使学生认识这层氧化铝薄膜的存在呢?我们
Aluminum is easily oxidized by air at room temperature and can replace hydrogen in cold water. However, aluminum is not oxidized or no longer oxidized due to the formation of a dense aluminum oxide film on the aluminum surface And water effect. How to make students understand the existence of this layer of alumina film? We