Fe(OH)_2的制备是人教版普通高中《化学1》第三章第二节“几种重要的金属化合物”中的演示实验。我们对该实验进行了以下改进。一、实验试剂和仪器蒸馏水、硫酸、铁粉、氢氧化钠晶体、煤油,烧杯、药匙、铁架台、酒精灯、石棉网、火柴。二、实验操作与现象1.煮沸除氧取1 mol/L稀硫酸10 mL,倒入有0.5 g铁粉的烧杯中, The preparation of Fe (OH) _2 is a demonstration experiment in Chapter 3, Section 2 of “Chemistry 1”, “Several Important Metallic Compounds” of the general high school of PEP. We made the following improvements to the experiment. First, the experimental reagents and equipment Distilled water, sulfuric acid, iron powder, sodium hydroxide crystals, kerosene, beaker, medicine spoon, iron stand Taiwan, alcohol lamp, asbestos net, matches. Second, the experimental operation and the phenomenon 1. Boil deoxygenation to take 1 mol / L dilute sulfuric acid 10 mL, poured into a 0.5 g iron powder beaker,