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Acidified potassium dichromate

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ATB_roo | 19:31 Wed 11th Mar 2009 | Science
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When acidified potassium dichromate is used in organic chemistry to oxidise alcohols, nearly all the text books state the colour change is 'from organge to green'. But when I do the experiments in the lab the colour change is normally orange to blue. Why is this?

Does that fact that the alcochol is oxidised to a carboxylic acid (green) but then the oxidation continues till the carboxylic acid oxidised to carbon dioxide and water, which possibly creates a blue colour? I don't really know, thats just a guess.

Thanks

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Are you using Schiff's reagent. Sometimes its composition can change.
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I've never heard of Schiff's reagent so I don't think we have been using it. Thank you anyway though.
Could there be a possible explanation here?

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Acidified potassium dichromate

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