氧化还参反应方向,氧化还原反应进行的程度,以及氧化还原反应的产物,往往与溶液的酸度有很大关系。AsⅤ/AsⅢ与I_3-/I-电对的氧化还原反应就是一典型示例。掌握氧化还原反应随PH值等条件变化的情况,就可以正确地予见反应产物、正确地书写反应方程式、正确地给出和控制反应条件,从而得出正确的定量分析结果。本文试图用斜率作图法讨论这一问题。 Oxidation of the reaction direction, the extent of the redox reaction, as well as the product of the redox reaction, often with the acidity of the solution has a great relationship. A typical example is the redox reaction of AsV / AsIII with I_3- / I-. Grasp the redox reaction with the PH value and other conditions change, you can correctly see the reaction products, the correct reaction equations written to correctly give and control the reaction conditions, and thus come to the correct quantitative analysis results. This article attempts to discuss this issue using slope mapping.