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Electrolytic Cells Chemistry Chapter 19 E
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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
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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
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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
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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)
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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)
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Predicting Spontenaity
Eocell calculated: Eocell = Eocathode - Eoanode If Eocell is positive, reaction is spontaneous Reaction with lowest standard reduction potential is the anode
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