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元素氧化物的酸碱性,可根据元素的金属性、非金属性,或者元素在周期表中的位置,以及元素的氧化态等加以定性判别。本文介绍一种判别氧化物酸碱性的半定量方法——热力学判别法。需要首先指出的是,我们这里所讨论的氧化物是指正常氧化物中的简单氧化物,可用通式MxOy表示,其中氧的氧化态为-2。当氧化物MxOy溶于水时,有两种可能的离解方式。其一是:
The acidity and alkalinity of the elemental oxide can be qualitatively judged based on the metallity and non-metallity of the element, or the position of the element in the periodic table, and the oxidation state of the element. This article describes a semi-quantitative method to determine the acidity and alkalinity of oxides—thermodynamic discrimination method. It needs to be pointed out firstly that the oxides we discuss here refer to simple oxides in normal oxides, which can be represented by the general formula MxOy, wherein the oxidation state of oxygen is -2. When the oxide MxOy dissolves in water, there are two possible ways of dissociation. One is: