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Topic: Which reactions could happen?  (Read 3230 times)

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Offline zokora

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Which reactions could happen?
« on: February 06, 2014, 08:15:14 AM »
Dear all,

I mixed 2 solutions: FeCl2 (light green) and NaHSO3. It appears orange yellow color immediately. Then I had left the solution for 1 day, the red yellow color returned light green (like FeCl2).
I was wondering whether Fe(II) combine with HSO3 to become complexes? Thanks in advance.
Sorry for my bad English
« Last Edit: February 06, 2014, 09:43:20 AM by zokora »
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Offline zokora

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Re: Which reactions could happen?
« Reply #1 on: February 12, 2014, 08:50:23 AM »
Anybody?
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Offline Corribus

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Re: Which reactions could happen?
« Reply #2 on: February 12, 2014, 09:42:16 AM »
Well, ferrous salts are generally green in solution and ferric salts tend to be yellow-brown. Bisulfite is a reducing agent that will slowly react with dissolved oxygen to form sulfate.

Does this give you any clues to what may be happening?
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Offline zokora

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Re: Which reactions could happen?
« Reply #3 on: February 24, 2014, 05:25:31 AM »
Thanks Corribus,

I also thought about that possibility. But I didnt see any precitipation, just the yellow-brown solution. Additionally, the solution turned to the initial color (light green) after 1 day.
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