114. One type of breathalyzer employs a fuel cell to measure the quantity of alcohol in the breath. When a suspect blows into the breathalyzer, ethyl alcohol is oxidized to acetic acid at the anode: CH;CH,OH(g) + 4 OH (aq) - HC,H;O;(g) + 3 H2O(1) + 4 e ethyl alcohol acetic acid At the cathode, oxygen is reduced: 0,(g) + 2 H,O(1) + 4 e 4 OH (aq) The overall reaction is the oxidation of ethyl alcohol to acetic acid and water. When a suspected drunk driver blows 188 mL of his breath through this breathalyzer, the breathalyzer produces an average of 324 mA of current for 10 s. Assuming a pressure of 1.0 atm and a temperature of 25°C what percent (by volume) of the driver's breath is ethanol?
114. One type of breathalyzer employs a fuel cell to measure the quantity of alcohol in the breath. When a suspect blows into the breathalyzer, ethyl alcohol is oxidized to acetic acid at the anode: CH;CH,OH(g) + 4 OH (aq) - HC,H;O;(g) + 3 H2O(1) + 4 e ethyl alcohol acetic acid At the cathode, oxygen is reduced: 0,(g) + 2 H,O(1) + 4 e 4 OH (aq) The overall reaction is the oxidation of ethyl alcohol to acetic acid and water. When a suspected drunk driver blows 188 mL of his breath through this breathalyzer, the breathalyzer produces an average of 324 mA of current for 10 s. Assuming a pressure of 1.0 atm and a temperature of 25°C what percent (by volume) of the driver's breath is ethanol?
Chemistry
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ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter18: Electrochemistry
Section: Chapter Questions
Problem 127AE: One of the few industrial-scale processes that produce organic compounds electrochemically is used...
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Transcribed Image Text:114. One type of breathalyzer employs a fuel cell to measure the
quantity of alcohol in the breath. When a suspect blows into the
breathalyzer, ethyl alcohol is oxidized to acetic acid at the anode:
CH;CH,OH(g) + 4 OH (aq) - HC,H;O;(g) + 3 H2O(1) + 4 e
ethyl alcohol
acetic acid
At the cathode, oxygen is reduced:
0,(g) + 2 H,O(1) + 4 e 4 OH (aq)
The overall reaction is the oxidation of ethyl alcohol to acetic
acid and water. When a suspected drunk driver blows 188 mL of
his breath through this breathalyzer, the breathalyzer produces
an average of 324 mA of current for 10 s. Assuming a pressure of
1.0 atm and a temperature of 25°C what percent (by volume) of
the driver's breath is ethanol?
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