When Suspected Drunk Drivers Are Tested with a Breathalyzer,the Alcohol

Multiple Choice

When suspected drunk drivers are tested with a Breathalyzer,the alcohol (ethanol) in the exhaled breath is oxidized to acetic acid with an acidic solution of potassium dichromate: 3CH₃CH₂OH(aq) + 2Cr₂O₇^-2 (aq) + 16H⁺(aq) 3CH₃CO₂H(aq) + 4Cr⁺³(aq) + 11H₂O (l)
If Eº for this cell is 1.30V and the standard half-cell potential of Cr₂O₇^-2(aq) to Cr⁺³ is 1.358 V,what is the standard half-cell reduction potential for the conversion of acetic acid to ethanol?

A) 2.658 V
B) -2.658 V
C) + 0.058 V
D) -0.058 V