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Topic: Chromium oxidation  (Read 2953 times)

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Offline Rutherford

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Chromium oxidation
« on: August 31, 2012, 01:18:55 PM »
I know that in acidic solution Cr2O72- and CrO42- get reduced to Cr3+, but under what conditions Cr3+ gets oxidized to CrO42-, and what conditions are required to make Cr2O72-?

Offline Borek

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Re: Chromium oxidation
« Reply #1 on: August 31, 2012, 02:02:41 PM »
what conditions are required to make Cr2O72-?

Just a matter of pH:

2CrO42- + 2H+ ::equil:: Cr2O72- + H2O
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Offline Rutherford

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Re: Chromium oxidation
« Reply #2 on: August 31, 2012, 03:58:27 PM »
Then, acidic solution=dichromate, basic solution=chromate?

Offline Borek

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Re: Chromium oxidation
« Reply #3 on: August 31, 2012, 05:00:32 PM »
Or mixture of both.
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Offline Rutherford

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Re: Chromium oxidation
« Reply #4 on: September 01, 2012, 03:54:17 AM »
Okay, thanks.

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