1) One of the differences between a voltaic cell and an electrolytic cell is tha
ID: 1005184 • Letter: 1
Question
1) One of the differences between a voltaic cell and an electrolytic cell is that in an electrolytic cell __________. a. an electric current is produced by a chemical reaction b. electrons flow toward the anode c. a nonspontaneous reaction is forced to occur d. O2 gas is produced at the cathode e. oxidation occurs at the cathode
2)
A voltaic cell is constructed with two silver-silver chloride electrodes, where the half-reaction is
AgCl (s) + e-------Ag(s) +Cl- Ecircle= + 0.222v
The concentrations of chloride ion in the two compartments are 0.0222 M and 2.22 M, respectively. The cell emf is __________ V.
a.
0.212
b.
0.118
c.
0.00222
d.
22.2
e.
0.232
Comment
a.
0.212
b.
0.118
c.
0.00222
d.
22.2
e.
0.232
Explanation / Answer
1) answer : a nonspontaneous reaction is forced to occur
2) answer : b) 0.118 V
Ecell = 0.05916 / n * log [cathode / anode]
= 0.05916 / 1 * log (2.22 / 0.0222)
= 0.118 V
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