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A person's blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma...

A person's blood alcohol (C2H5OH) level can be determined by titrating a sample of blood plasma with a potassium dichromate solution. The balanced equation is

16H+(aq) + 2Cr2O72−(aq) + C2H5OH(aq) → 4Cr3+(aq) + 2CO2(g) + 11H2O(l)

If 35.46 mL of 0.05961 M Cr2O72− is required to titrate 27.30 g of plasma, what is the mass percent of alcohol in the blood?

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