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为什么有些含氧酸是强酸,有些含氧酸是弱酸?这是在教学中学生常问到的问题。物质的性质取决于物质的结构。现从分子结构的观点来解释含氧酸的酸性强弱。许多酸类含有氢和氧并伴随另一个非金属元素。观察这些酸类的分子,可电离的氢原子总是与氧原子结合在一起的。例如磷的两种含氧酸:磷酸H_3PO_4和亚磷酸H_3PO_3两者都是每一分子中含有3个氢原子,但是磷酸是三元酸而亚磷酸却是二元酸。这从它
Why do some oxoacids are strong acids and some oxoacids are weak acids? This is a question that students frequently ask in teaching. The nature of matter depends on the structure of the material. The acidity of oxoacids is explained from the viewpoint of molecular structure. Many acids contain hydrogen and oxygen along with another non-metallic element. Observing these acid molecules, ionizable hydrogen atoms are always bound to oxygen atoms. For example, two oxo acids of phosphorous: phosphoric acid H_3PO_4 and phosphorous acid H_3PO_3 both contain 3 hydrogen atoms per molecule, but phosphoric acid is a tribasic acid and phosphorous acid is a dibasic acid. This from it