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一、氧化性和还原性的变化规律1.浓度与物质氧化性、还原性增大物质的浓度,其氧化性(还原性)随之增强,减少物质的浓度,其氧化性(还原性)随之减弱。如浓硝酸氧化性强于稀硝酸,浓硫酸氧化性强于稀硫酸等。例1:38.4mg 铜跟适量的浓硝酸反应,铜全部反应后,共收集到气体22.4mL(标态),反应消耗的 HNO_3的物质的量可能是( )A.1.0×10~(-3)mol B.1.6×10~(-3)molC.2.2×10~(-3)mol D.2.4×10~(-3)mol解析:铜与浓 HNO_3反应生成 NO_2,但随着硝酸量的逐步减少,硝酸溶液的浓度变稀,则硝酸的氧化性渐弱,故随
First, the oxidation and reduction of the law of change 1. Concentration and oxidation of the material, reducing the increase in the concentration of substances, the oxidative (reducing) will increase, reduce the concentration of the substance, the oxidation (reducibility) with Weakened. For example, concentrated nitric acid is more oxidizing than dilute nitric acid, and concentrated sulfuric acid is more oxidizing than dilute sulfuric acid. Example 1: 38.4 mg of copper reacted with the appropriate amount of concentrated nitric acid. After the total reaction of copper, a total of 22.4 mL of gas was collected (standard state). The amount of HNO_3 consumed by the reaction may be () A.1.0×10~(-3). )mol B.1.6×10 -3 mol C.2.2×10 -3 mol D.2.4×10 -3 mol The copper reacts with concentrated HNO 3 to generate NO 2 , but with the amount of nitric acid As the concentration of the nitric acid solution gradually decreases, the oxidation of nitric acid gradually decreases, so