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在分析化学中过氧化氫有时被用作氧化剂,有时被用作还原剂。根据湼克拉索夫的解释:“过氧化氫在酸性介貭中,此較明显地表現出氧化剂的作用,在碱性介貭中——还原剂的作用”。事实上并非完全如此。过氧化氫在酸性介貭中是可以表現出氧化剂的作用;但在碱性介貭中也能比較明显地表現出氧化剂的作用,而不是还原剂的作用;只有在强氧化剂的作用下才能表現出还原剂的作用。这个問題应該如何解释?作者根据参考材料,提出个人的看法。正确与否?希望大家指正。过氧化氫的性质和結构純过氧化氫是粘稠液体,它有比水更大的比重(1.4694/0℃)和比水更高的介电常数(水的介电常数84.4/0℃,过氧化氫的介电常数89.2/0℃),过氧化氫溶于水后介电常数升高,含有36%的过氧化氫水溶液的介电常数为120。过氧化氫是一种很好的极性溶
In analytical chemistry hydrogen peroxide is sometimes used as an oxidizer, sometimes as a reducing agent. According to Nekrasov’s explanation: “Hydrogen peroxide in acidic media, which more clearly demonstrated the role of oxidant, in alkaline media - the role of reducing agent.” In fact it is not exactly the case. Hydrogen peroxide in the acidic medium can show the role of oxidant; but in the alkaline medium 也 also be more obvious to show the role of oxidant, rather than the role of reductant; only in the role of strong oxidants can be A reductant role. How should this be explained? The author proposes personal opinions based on reference materials. Correct or not? I hope you correct me. Properties and Structure of Hydrogen Peroxide Pure hydrogen peroxide is a viscous liquid that has a greater specific gravity (1.4694 / 0 ° C) than water and a higher dielectric constant than water (dielectric constant of 84.4 / 0 ° C for water, The dielectric constant of hydrogen peroxide is 89.2 / 0 ° C), the dielectric constant of hydrogen peroxide increases after dissolving in water, and the dielectric constant of 36% aqueous hydrogen peroxide solution is 120. Hydrogen peroxide is a good polar solvent