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非含氧酸是无机酸中最简单的一种酸,它们的成酸元素是位于周期系ⅥA、ⅦA的元素。同周期元素或同族元素所成的非含氧酸其酸性强弱的变化规律,可以通过对成酸元素的电负性、原子半径数值的分析比较而得出。但是,在讨论非含氧酸时,往往不只是进行这种粗糙的相对比较,而需要了解各种非含氧酸的强度数值。因为只有了解到了各种非含氧酸的强度数值,才能严格地比较它们的酸性强弱。例如,氢硒酸、氢氟酸二者酸性强弱如何呢?显然从Se和F的电负性、原子半径是难以比较的。要解决这类问题,有待于进行具体的定量计算。
Non-oxo acids are the simplest acids in mineral acids, and their acid-forming elements are those in the Periodic System VIA, VIIA. The changes of the acidity of the non-oxo acids formed by the same periodic elements or homologous elements can be obtained through the comparison and analysis of the electronegativity and atomic radius of the acid elements. However, when discussing non-oxo acids, it is often not just a rough comparison of these but the intensity values of various non-oxo acids. Because only understand the various non-oxo acid strength values, we can strictly compare their acid strength. For example, hydrogen selenide, hydrofluoric acid both strong acidic? Clearly from Se and F electronegativity, the atomic radius is difficult to compare. To solve this kind of problem, it needs to carry out specific quantitative calculation.