The alcohol (ethanol) in the exhaled breath is oxidized to acetic acid with an acidic solution of potassium dichromate when suspected drunk drivers are tested with a Breathalyzer:
3 CH3CH2OH (aq) + 2Cr2O72- (aq) + 16H+ (aq) → 3CH3COOH (aq) + 4Cr3+ (aq) + 11 H2O(l)
Determine the overall cell potential for the reaction when the concentrations of ethanol, if the standard half-cell potential for the reduction of acetic acid to ethanol is 0.058 V, acetic acid,Cr2O72-, and Cr3+ are1.0 M and the pH is 4.00?