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好吧问答库 > cr2+和cr3+在酸性介质中稳定吗?为什么?

cr2+和cr3+在酸性介质中稳定吗?为什么?

cr2+和cr3+在酸性介质中稳定吗?为什么?

2025年04月06日 04:38

有2个网友回答

网友（1）：

亚铬离子、铬离子、铬酸根离子、重铬酸根离子望采纳，谢谢！！~

网友（2）：

Cr3+和Cr2+均不歧化，但 Eθ(Cr2O72-／Cr3+)〉Eθ（O2/H2O），Cr3+不易被氧化，较稳定。

而Eθ（Cr3+/Cr2+）<< Eθ（O2/H2O）,所以Cr2+极不稳定，在酸性介质中极易被空气中的氧气氧化成Cr3+。

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