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·实验预习·１．氢气的制取和氢气的性质．２．点燃氢气前为什么必须检验氢气的纯度？检验氢气纯度如何正确操作？３．做氢气还原氧化钢实验时，开始和结束实验时应注意什么问题？为什么？４．如何用化学方法鉴别氢气和氧气？ ·实验报告·实验目的实验用品仪器：药品和材料：
·Experimental preparations 1. Preparation of hydrogen and hydrogen properties. 2. Why must the purity of hydrogen be checked before igniting hydrogen? How to verify the correct operation of hydrogen purity? 3. When doing the hydrogen reduction steel experiment, what problems should be paid attention to when starting and ending the experiment? why? 4. How to chemically identify hydrogen and oxygen? ·Experimental Reports · Experimental Purposes Laboratory Supplies: Pharmaceuticals and Materials: