Question

A chemical “brearhalyzer” test works because ethyl alco¬hol in the breath is oxidized by the dichromate ion (orange) to form acetic acid and chromium(III) ion (green). The balanced reaction is
You analyze a breathalyzer test in which 4.2 mg of K2Cr2O7 was reduced. Assuming the volume of the breath was 0.500 L at 30.°C and 750. mm Hg, what was the mole percent alcohol of the breath?


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  • CreatedMay 05, 2015
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