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理论试题(一) 1.铁盐的基本性质有4方面:(1)Fe~(2+)与Fe~(3+)间的相互转变;(2)它们的水解;(3)难溶氢氧化物或盐的形成和溶解;(4)配合物的形成。这些性质决定铁盐在自然环境中和在生物体内的存在状态和它们的作用。例如,在我国南方某些地区,刚从地下打上来的水是透明的,但放置一段时间后便出现红棕色沉淀,表面上形成一层“油皮”。用此水洗脸,用过的毛巾经凉晒后也会被染成红棕色。
Theoretical Test Questions (1) 1. The basic properties of iron salts are fourfold: (1) mutual transformation between Fe~(2+) and Fe~(3+); (2) their hydrolysis; (3) insoluble hydrogen Formation and dissolution of oxides or salts; (4) Formation of complexes. These properties determine the presence and role of iron salts in the natural environment and in living organisms. For example, in some areas of southern China, water that has just been applied from the ground is transparent, but after a period of time, reddish-brown precipitates form and a layer of oil skin is formed on the surface. Wash your face with this water, and the used towel will be dyed reddish brown after being cooled.