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Author Question: When suspected drunk drivers are tested with a Breathalyzer, the alcohol (ethanol) in the exhaled ... (Read 77 times)

humphriesbr@me.com

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on: Feb 15, 2020
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:

3 CH3CH2OH(aq) + 2 Cr2O7-2 (aq) + 16 H+(aq) 3CH3CO2H(aq) + 4Cr+3(aq) + 11H2O (l)


What is the value of E for the reaction when the concentrations of ethanol, acetic acid, Cr2O7-2, and Cr+3, are 1.0M and the pH is 4.00? (Eº for this cell is 1.30V and the temperature is 298K) .
Equations to solve this problem are below.

ε = ε° - lnQ

ε = 1.30 - ln

◦ 1.24 V
◦ 1.30 V
◦ 0.98 V
◦ 1.62 V
Chemistry ¦ McMurry, Fay, Robinson ¦ 7th Edition
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Marked as best answer by humphriesbr@me.com on Feb 15, 2020

bitingbit

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Reply #1 on: Feb 15, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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humphriesbr@me.com

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Reply 2 on: Feb 15, 2020
Great answer, keep it coming :)

Dominic

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Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

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