Electrochemistry Study Preparation with Complete
Solutions: Exercises and Explanations, Exams of
Electrochemistry
What is electrochemistry?
Electrochemistry is the branch of chemistry concerned with the interconversion of chemical and
electrical energy.
What are the two basic types of electrochemical cells?
The two basic types of electrochemical cells are galvanic cells (also called voltaic cells) and electrolytic
cells.
What is the difference between a galvanic cell and an electrolytic cell?
In a galvanic cell, a spontaneous chemical reaction generates an electric current.
In an electrolytic cell, an electric current drives a nonspontaneous reaction.
The two types are inverse processes.
What is an anode?
An anode is the electrode at which oxidation takes place.
What is a cathode?
A cathode is the electrode at which reduction takes place.
How did anode and cathodes get their names?
Anions move TOWARD the anode.
Cations move TOWARD the cathode.
What is the sign convention for anodes and cathodes?
We regard the anode as negative and the cathode as positive.
Describe 4 qualities of an anode.
Oxidation occurs at the anode.
Electrons are "produced" in the anode.
Anions migrate toward the anode.
Anodes have negative sign.
Describe four qualities of a cathode.
Reduction occurs at the cathode.
Electrons are "consumed" in the cathode.
Cations migrate toward the cathode.
Cathodes have positive sign.
What are the conventions for galvanic shorthand notation?
, Anode half reaction on left, cathode half reaction on right.
Single vertical line (|) indicates a phase boundary.
Double vertical line (||) indicates the salt bridge.
Anode is leftmost, cathode is rightmost.
What is a Daniell cell?
A Daniell cell is a voltaic cell which uses a zinc anode and copper cathode. The ion solutions are zinc
sulphate and copper (II) sulfate. The salt bridge is an arbitrary nonreactive salt.
How do columbs and volts relate to joules?
How does free energy relate to cell potential?
What is the value of Faraday's constant?
F = 96,500 C / mol * e^-
What is a standard cell potential?
The standard cell potential is the cell potential when...
both the reactants and products are in their standard states
solutes are at 1 M concentration
gasses are at 1 atm
Solids and liquids in pure form
Specified temperature (usually 25' C)
What is the standard free-energy change?
How do the standard half-cell potentials contribute to the standard potential?
What is the Standard Hydrogen Electrode (S.H.E.)
The standard hydrogen electrode is a reference half-cell which is used to obtain standard
cellpotentials.
List the equations for this chapter
How does electrical potential depend on how much reaction occurs?
An electrical potential does not depend on how much reaction occurs.
How does spontaneity depend upon standard cell potentials?
Solutions: Exercises and Explanations, Exams of
Electrochemistry
What is electrochemistry?
Electrochemistry is the branch of chemistry concerned with the interconversion of chemical and
electrical energy.
What are the two basic types of electrochemical cells?
The two basic types of electrochemical cells are galvanic cells (also called voltaic cells) and electrolytic
cells.
What is the difference between a galvanic cell and an electrolytic cell?
In a galvanic cell, a spontaneous chemical reaction generates an electric current.
In an electrolytic cell, an electric current drives a nonspontaneous reaction.
The two types are inverse processes.
What is an anode?
An anode is the electrode at which oxidation takes place.
What is a cathode?
A cathode is the electrode at which reduction takes place.
How did anode and cathodes get their names?
Anions move TOWARD the anode.
Cations move TOWARD the cathode.
What is the sign convention for anodes and cathodes?
We regard the anode as negative and the cathode as positive.
Describe 4 qualities of an anode.
Oxidation occurs at the anode.
Electrons are "produced" in the anode.
Anions migrate toward the anode.
Anodes have negative sign.
Describe four qualities of a cathode.
Reduction occurs at the cathode.
Electrons are "consumed" in the cathode.
Cations migrate toward the cathode.
Cathodes have positive sign.
What are the conventions for galvanic shorthand notation?
, Anode half reaction on left, cathode half reaction on right.
Single vertical line (|) indicates a phase boundary.
Double vertical line (||) indicates the salt bridge.
Anode is leftmost, cathode is rightmost.
What is a Daniell cell?
A Daniell cell is a voltaic cell which uses a zinc anode and copper cathode. The ion solutions are zinc
sulphate and copper (II) sulfate. The salt bridge is an arbitrary nonreactive salt.
How do columbs and volts relate to joules?
How does free energy relate to cell potential?
What is the value of Faraday's constant?
F = 96,500 C / mol * e^-
What is a standard cell potential?
The standard cell potential is the cell potential when...
both the reactants and products are in their standard states
solutes are at 1 M concentration
gasses are at 1 atm
Solids and liquids in pure form
Specified temperature (usually 25' C)
What is the standard free-energy change?
How do the standard half-cell potentials contribute to the standard potential?
What is the Standard Hydrogen Electrode (S.H.E.)
The standard hydrogen electrode is a reference half-cell which is used to obtain standard
cellpotentials.
List the equations for this chapter
How does electrical potential depend on how much reaction occurs?
An electrical potential does not depend on how much reaction occurs.
How does spontaneity depend upon standard cell potentials?
