One way of determining blood alcohol levels is by performing a titration on a sample of blood. In this process, the alcohol from the blood is oxidized by dichromate ions (Cr₂O₇ ^2-) according to the following net ionic equation:

A 10.00-g sample of blood was drawn from a patient, and 13.77 mL of 0.02538 M K₂Cr₂O₇ was required to titrate the alcohol. What was the patient’s blood alcohol level? (See the previous problem for definition of blood alcohol level. K₂Cr₂O₇ is a strong electrolyte, so it dissociates completely in solution.)

Transcribed Image Text:

C₂H5OH + 2 Cr₂O72- + 16 H+. 2 CO₂ + 4 Cr³+ + 11 H₂O