In Washington state, the legal limit for a driver’s blood alcohol is 0.08%. A driver suspected of a DUI violation submitted a 5.00 g blood sample, which was analyzed by reaction with dichromate ion to determine the ethanol (C2H5OH) content, as shown in the net ionic equation below:   3 C2H5OH(aq)  +  2 Cr2O72-(aq)  +  16 H+(aq)  ®   3 HC2H3O2(aq)  +  4 Cr3+(aq)  +  11 H2O(l)   If the blood sample required 13.08 mL of a 5.26´10–3M dichromate ion solution to completely react with the ethanol in the blood, calculate the driver’s blood alcohol content (mass percent concentration of C2H5OH in the blood).

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