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对于周期系中第Ⅴ、Ⅵ、Ⅶ类主族元素所形成的某些氢化物的酸碱性及其酸碱强度的经验计算法,前人虽然有过不少论述,但还没有一个统一的计算式。本文试图从这些元素的两个基本性质,原子共价半径和价电子数出发,对它们的氢化物在水溶液中的酸碱性强弱,提出一种较为简便的经验计算法。一个化合物在溶液中的电离,既决定于它本身的内部结构,又决定于溶剂的性质,当我们讨论这些氢化物在水溶液中酸碱性强弱的规律时,因为介质相同,它们的酸碱性强弱主要决定于其分子结构。对 H_aX 型氢化物而言(a 为氢原子数,a=8-n,n 为 X 原子的
For the periodic system of V, Ⅵ, Ⅶ main group of elements formed by the hydrotalcite pH and acid-base strength of the empirical calculation method, although there have been many expositions, but there is no uniform Formula. This paper attempts to proceed from the two basic properties of these elements, the atomic covalent radius and valence number of electrons, their hydride in aqueous solution of the strength of acid-base, a more simple empirical calculation method. The ionization of a compound in solution depends not only on its own internal structure but also on the nature of the solvent. When we discuss the laws of the strength and weakness of these hydrides in aqueous solution, because their media are the same, their acid-base The strength depends mainly on its molecular structure. For H_aX type hydride (a is the number of hydrogen atoms, a = 8-n, n is the X atom