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一、创新实验目的1.通过蜡烛燃烧消耗密闭容器中的氧气,并用氢氧化钠溶液吸收产生的二氧化碳气体,通过水面上升的高度读出消耗的氧气体积,从而测定出空气中氧气的含量。2.利用生活物品进行实验,增强实验的趣味性,节约资源。3.通过对实验原理和装置的改变,加强环保意识。二、实验仪器及药品小蜡烛头1支,圆柱形玻璃杯1个,玻璃鱼缸1个,小薄木板1块,氢氧化钠溶液,酚酞试液。
First, the purpose of innovative experiments 1. By burning the candle consume airtight containers of oxygen, and sodium hydroxide solution to absorb the carbon dioxide gas produced by rising water surface height of the consumption of oxygen read out to determine the content of oxygen in the air. 2. The use of daily necessities to experiment, enhance the fun of the experiment, saving resources. 3. Through the experimental principle and device changes, to enhance environmental awareness. Second, the experimental apparatus and medicine Small candle 1, 1 cylindrical glass, glass fish tank 1, a thin veneer, sodium hydroxide solution, phenolphthalein test solution.