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Chemistry 12 Unit V: Electrochemistry
Terms in this set (20)
What is the first step to balancing half reactions?
Balance major atoms
What is the first step in balancing redox equations using half reactions?
Break it down into two half reactions
True or False: In a redox reaction the increase in oxidation number of one species must equal the decrease in oxidation number of the second species.
What is the equivalence point?
When the amount of a compound added has reacted with all of the amount of a certain compound in the solution.
Does reduction or oxidation occur at the cathode?
Does reduction or oxidation occur at the anode?
If the standard reduction potential is >0, is the reaction spontaneous?
Does the surface area of an electrode affect the cell potential?
In a spontaneous reaction, the preferred reaction is the two reactions that are located the furtherest/closest apart on the table.?
Furthest (reduction must be above oxidation)
Is corrosion always rust?
Is rust always corrosion?
Name one method to prevent corrosion
Isolate the metal. (e.g. cover with paint)
What is electrolysis?
Forcing a non-spontaneous reaction is happen by applying a current.
While electroplating, is the object being electroplated the cathode or anode?
Is a salt bridge required to have a functioning electrochemical cell?
Can a spontaneous reaction be an electrolytic cell?
[Fe3+] = 1M [Fe3+] = 2M
Fe3+ + e- --> Fe2+ Standard potential = 0.77V
Which concentration has higher reduction potential?
2M Fe3+ or Ecell > 0.77V
What is rust?
The corrosion of iron
A reaction has E < 0. Is it spontaneous?
What can you use to measure electric current?
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