1. Electrolytic Cells
Chemistry Chapter 19 E

2. Electrolytic Cells Electrolytic cell: Electrolysis:
Electricity is used to cause a redox reaction to occur in electrochemical cell
Electrolysis:
Electric current is used to cause a redox reaction

3. Differences Differences between voltaic cell and electrolytic cell:
Anode and cathode of electrolytic cell connected to a battery; voltaic cell is a source of current
Electrolytic cells components produce nonspontaneous redox reaction
Voltaic cells produce spontaneous redox reaction

4. Electroplating Definition:
Electrolytic process where a metal ion is reduced and deposited on a surface
Metal is removed from anode, goes into solution, and is deposited at cathode
Contains:
Solution with ion of plating metal
Object to be coated at cathode
Anode is piece of plating metal

5. Rechargeable Cells Definition: Common example:
Works as electrolytic cell part of the time
Works as voltaic cell part of the time
Common example:
Car battery (lead battery)

6. Electrode Potential Reduction potential: Electrode potential:
Tendency for reduction half reaction to occur at an electrode
Electrode potential:
Difference in potential between electrode and its electrolyte solution
Measured in volts
Relative reduction potential measured by comparing with standard hydrogen electrode (SHE)

7. Predicting Spontenaity
Eocell calculated:
Eocell = Eocathode - Eoanode
If Eocell is positive, reaction is spontaneous
Reaction with lowest standard reduction potential is the anode

8. Now it’s your turn!
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