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碱土金属氢氧化物和硫酸盐的溶解度都是很有规律的。现将它们溶解度的数据列于下表(表1)中。从表1中碱土金属氢氧化物和硫酸盐在水中的溶解度的数据可见,它们的变化规律刚好相反。这是什么原因?在一般无机化学教科书中没有解释。我们试用有关热力学数据能较好地说明这个问题。现讨论如下。根据热力学原理,因为△G~0是决定反应的方向和限度的热力学变量,所以物质在水中的
The solubility of alkaline earth metal hydroxides and sulfates is very regular. The data of their solubility are listed in the following table (Table 1). As can be seen from the data in Table 1, the solubility of alkaline earth metal hydroxides and sulfates in water, the laws of their change are just the opposite. What is the reason? This is not explained in general inorganic chemistry textbooks. We try the thermodynamic data to better illustrate this problem. Are discussed below. According to the principle of thermodynamics, because △ G ~ 0 is a thermodynamic variable that determines the direction and limit of the reaction, the substance in the water