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纯净的磷酸是无色的晶体,在42℃时熔解,38℃时凝固成固体状态的晶体。通常用的磷酸是一种含磷酸70～80%的糖浆状溶液,磷酸何以如此粘稠呢?何以是非氧化性酸呢?本文不妨从结构上加以分析。 (1)磷酸是非氧化性酸含氧酸是否有氧化性,取决于组成该酸的酸根离子结构的稳定性。如果酸根离子不稳定,能分解,并且分解后价态有变化,就是氧化性酸,否则就是非氧化性酸。在H_3PO_4分子中(图一),磷原子的三个sp~3杂化
Pure phosphoric acid is a colorless crystal that melts at 42 ° C and solidifies to a solid state at 38 ° C. The commonly used phosphoric acid is a kind of syrup solution containing 70-80% phosphoric acid. How is phosphoric acid so thick? What is non-oxidizing acid? This article may wish to analyze structurally. (1) Phosphoric acid is a non-oxidizing acid An oxo acid is oxidized depending on the stability of the acid ion structure of the acid. If the acid ion instability, can be decomposed, and valence change after decomposition, is the oxidizing acid, or non-oxidizing acid. In the H_3PO_4 molecule (Figure 1), three sp ~ 3 hybrids of phosphorus atoms