Acidified KCrO7

[匿名]

2011-05-31 5:01 am

What acid( H2SO4, HCl, HNO3) is use to acidified Acidified KCrO7 or KMnO4? Why?
Thank you!

回答 (2)

知識就是力量

2011-05-31 5:19 am

✔ 最佳答案

ONLY dilute H2SO4 can be used to acidified both KCrO7 and KMnO4.

Cl- in dilute and concentrated HCl will be oxidized by KMnO4 which makes the acidification process not effective.

The dilute, concentrated HNO3 and concentrated H2SO4 are strong oxidizing agents, it cannot determine which chemicals in the mixture are responsible for oxidization reaction when reacted with other reducing agents.

Dilute H2SO4 is neither oxidizing agent nor reducing agent. And the SO4^2- is a very weak reducing agent which is not reactive to the KCrO7 and KMnO4. It is the most suitable for acidifying the KCrO7 and KMnO4.

2011-05-30 22:40:42 補充：
上面手民之誤KCrO7應為K2Cr2O7

參考: Knowledge is power.

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己式庚辛

2011-05-31 9:34 pm

這裡我有個問題.
如果不是應用在化學量化分析, 而是純粹的要氧化某化學品(例如乙醇), 那又是否可以使用硝酸?

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