在中学化学教材中，关于氢氧化铝的沉淀形态叙述为白色絮状，笔者在教学中做了实验，结果得到了两种形态的氢氧化铝沉淀．一．实验现象1．按照中学化学教材中制取氢氧化铝的方法，向铝盐溶液中加入适量的氢氧化钠溶液或加入氨水，得到白色絮状沉淀．2．向铝盐溶液中加入过量氢 In the middle school chemistry textbook, the precipitation pattern of aluminum hydroxide is described as white flocculent. The author did experiments in teaching and obtained two forms of aluminum hydroxide precipitate. one. Experimental phenomena 1. According to the method of preparing aluminum hydroxide in the middle school chemistry textbook, add appropriate amount of sodium hydroxide solution or add ammonia to the aluminum salt solution to obtain a white flocculent precipitate. 2. Add excess hydrogen to aluminum salt solution