March 29, 2020, 09:33:41 PM
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Topic: when k2cro4 become k2cr2o7 does k2cro4 undergo oxidation?  (Read 238 times)

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Offline Helly

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when k2cro4 become k2cr2o7 does k2cro4 undergo oxidation?
« on: February 21, 2020, 02:27:34 PM »
 in this reaction 2k2cro4 + h2so4 --> k2cr2o7 + k2so4 + h2o

when k2cro4 become k2cr2o7 does k2cro4 undergo exidation?

Offline chenbeier

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Re: when k2cro4 become k2cr2o7 does k2cro4 undergo oxidation?
« Reply #1 on: February 21, 2020, 02:36:24 PM »
No, determine the oxidation numbers of chromium.

Offline Helly

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Re: when k2cro4 become k2cr2o7 does k2cro4 undergo oxidation?
« Reply #2 on: February 21, 2020, 02:44:34 PM »
the compound gets oxygen but in this case not oxidation? how can there is extra O attached to Cr without Cr being oxidized?

Offline OuJej1

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Re: when k2cro4 become k2cr2o7 does k2cro4 undergo oxidation?
« Reply #3 on: February 24, 2020, 03:37:43 AM »
That's not just simple oxidation - try thinking about the bonds of EACH Chromium in K2Cr2O7.

Offline Borek

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Re: when k2cro4 become k2cr2o7 does k2cro4 undergo oxidation?
« Reply #4 on: February 24, 2020, 07:00:22 AM »
As it was already said - this is not an oxidation at all.

You might want to refresh what oxidation is. Hint: no, it is not about number of bonds to oxygen. While number of such bonds often changes during oxidation, that's only a secondary effect which sometimes can be misleading. There is another, underlying change that is important.
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Offline Helly

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Re: when k2cro4 become k2cr2o7 does k2cro4 undergo oxidation?
« Reply #5 on: February 25, 2020, 02:46:39 PM »
Oh, yes, you guys were right.. thats what oxidizing means

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