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Potassium dichromate (K2Cr2O7) is a bright orange salt that can be converted to a blue-violet solution...

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Chemistry

Potassium dichromate (K2Cr2O7) is a bright orange salt that canbe converted to a blue-violet solution of Cr3+ ions. Under certainconditions, K2Cr2O7 reacts with ethanol (C2H5OH) to produce carbondioxide gas. The legal definition of intoxication is a bloodalcohol (C2H5OH) level of 0.08% by mass or higher. In a given case,35.48 mL of 0.05182 M K2Cr2O7 was required to titrate a 50.02 gsample of blood. From the tested sample, should the person bearrested for a DUI?

Assume that only the ethanol reacts with the potassiumdichromate.

C2+H5+OH (l) +K2Cr2O7 (aq) ---->CO2 (g) + K++ Cr3+

Answer & Explanation Solved by verified expert
4.4 Ratings (871 Votes)
The balance eqtaion isC2H5OH l 2K2Cr2O7 aq16H 2CO2 g 4K 4Cr3 11H2OGiven Molarity of K2Cr2O7 is 005182 M Volume ofK2Cr2O7 is 3548 mL 3548 x10 3 LNumber of moles of    See Answer
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