Shown below is an electrochemical cell with anode a and cathode c. Both the anode and the cathode are inert electrodes. The liquid shown in compartment b of the cell is molten potassium chloride, KCl(
l).
Determine whether this is a galvanic or an electrolytic cell and give the reaction occurring at the anode and the reaction occurring at the cathode.
◦ Electrolytic cell
Anode reaction: K(
s) → K
+(
l) + e
-
Cathode reaction: Cl
2(
g) + 2e
- → 2 Cl
-(
l)
◦ Galvanic cell
Anode reaction: K(
s) → K
+(
l) + e
-
Cathode reaction: Cl
2(
g) + 2e
- → 2 Cl
-(
l)
◦ Electrolytic cell
Anode reaction: 2 Cl
-(
l) → Cl
2(
g) + 2e
-
Cathode reaction: K
+(
l) + e
- → K(
s)
◦ Galvanic cell
Anode reaction: K(
s) → K
+(
l) + e
-
Cathode reaction: Cl
2(
g) + 2e
- → 2 Cl
-(
l)
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