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一、浓硫酸的吸水性浓H_2SO_4具有吸水性(如吸收气体中、液体中的水分子以及固体中的结晶水等)。注意:(1)稀H_2SO_4不具有吸水性。(2)浓硫酸的吸水性决定了浓硫酸相应地有一个重要用途——作吸水剂或干燥剂。浓硫酸是一种干燥效率很高的、常用的干燥剂。通常可用浓硫酸进行干燥的物质:H_2、CO_2、CH_4、CO、N_2、NO、NO_2、SO_2、HCl、Cl_2等。常见的不能用浓硫酸干燥的物质:H_2S、NH_3、HBr、HI等。用浓硫酸作干燥剂对
First, concentrated sulfuric acid absorbent H_2SO_4 with water absorption (such as absorption of gas, liquid water molecules and solid crystal water, etc.). Note: (1) dilute H_2SO_4 does not have water absorption. (2) The water absorption of concentrated sulfuric acid determines that concentrated sulfuric acid has an important use correspondingly - as a water-absorbing agent or a desiccant. Concentrated sulfuric acid is a drying efficiency, commonly used desiccant. Usually available sulfuric acid for drying substances: H_2, CO_2, CH_4, CO, N_2, NO, NO_2, SO_2, HCl, Cl_2 and so on. Common substances that can not be dried with concentrated sulfuric acid: H_2S, NH_3, HBr, HI and so on. Use concentrated sulfuric acid as desiccant pair