既非氧化性酸,又非还原性酸的酸有哪些?

PS:为什么稀硫酸的化合价同样是正6,却无氧化性呢?!
2025-04-06 07:19:12
推荐回答(1个)
回答1:

在浓硫酸中,硫酸大都是以分子状态存在的.分子中两个氢原子的半径很小,极化能力很强,很容易钻入硫酸根内部,它们对氧有较强的极化作用,消弱了硫与氧之间的作用,从而大大减弱了硫酸根的稳定性.所以硫易被还原,浓硫酸有氧化性.这种氧化性是未电离的硫酸分子的特征.稀硫酸中的硫不表现氧化性,这是由于硫酸溶于水后完全电离,硫元素完全是以硫酸根形式存在,硫酸根的空间构型近似为正四面体,而且硫原子居于正四面体的中心,2个单位的负电荷属于整个硫酸根.这样对称的结构不易受外界作用而极化,所以性质稳定.

以上是回答你后面的问题的。
至于既非氧化性酸,又非还原性酸的酸,稀硫酸、盐酸、碳酸、氢溴酸等

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