For the problems below, SHOW ALL WORK and and the correct number of significant
ID: 1028030 • Letter: F
Question
For the problems below, SHOW ALL WORK and and the correct number of significant figures to receive ful 11. I 12) DUI give the final answer with th n Washington state, the legal limit for a driver's blood alcohol is 0.08% violation submitted a 5.000 g blood sample, which was an l credit. Cirele ouA ysn ion to determine the ethanol (C2HsOH A driver analyzed by reaction content, as shown in the net ionic equation below 3 C21 Is( ) H (aq) + 2 Cr2072-(aq) ICAIN.(aq) + 4G+(aq) + 16H'(aq) 3 If the blood sample re quired 18.03 ml of a 5.260x10 'M dichromate ion solution to completey react with the ethanol in the blood, calculate the driver's blood alcohol content (mass percem concentration of CzHsO H in the blood)Explanation / Answer
mole of dichromate = 5.260*10-3 mole/lit * 18.03 *10-3 lit = 94.8378*10-6 mole = mole of alcohol
molar mass of C2H5OH = 46 gm/mole
94.8378*10-6 mole C2H5OH = 0.004362 gm
% mass = (0.004362 gm / 5 gm) *100 = 0.08 %