实验目的:1.制备氢氧化亚铁和氢氧化铁并作对比;2.对比钠、过氧化钠分别与盐溶液的反应;3.实现正二价铁向三价铁的转化;4.用简易装置以铜锌混合金属为原料快速制氢气,用它作为制备氢氧化亚铁的保护气,使氢氧化亚铁的白色沉淀状清晰可辨,并能保持较长时间以便与氢氧化铁对比观察 The purpose of the experiment: 1.Preparation of ferrous hydroxide and iron hydroxide and comparison; 2. Comparison of sodium, sodium peroxide and salt solution respectively; 3. Realization of bivalent iron to ferric transformation; 4. With simple The device uses copper-zinc mixed metal as raw material for rapid hydrogen production, and uses it as a protective gas for preparing ferrous hydroxide to make the white precipitates of ferrous hydroxide clear and maintainable for a long time so as to be compared with that of ferric hydroxide