Chapter 4, Problem 56QAP

Laws passed in some states define a drunk driver as one who drives with a blood alcohol level of 0.10% by mass or higher. The level of alcohol can be determined by titrating blood plasma with potassium dichromate according to the following equation

${\text{16H}}^{+}\left(aq\right)+{\text{Cr}}_{\text{2}}{\text{O}}_{\text{7}}{}^{\text{2}-}\left(aq\right)+{\text{C}}_{\text{2}}{\text{H}}_{\text{5}}\text{OH}\left(aq\right)\to {\text{4Cr}}^{\text{3}+}\left(aq\right)+{\text{2CO}}_{\text{2}}\left(g\right)+{\text{11H}}_{\text{2}}\text{O}$

Assuming that the only substance that reacts with dichromate in blood plasma is alcohol, is a person legally drunk if 38.94 mL of 0.0723 M potassium dichromate is required to titrate a 50.0-g sample of blood plasma?