AP Chemistry Study Guide, Test 4, Spring 2013
Vocabulary
Oxidation (OILRIG)
Reduction
Oxidation Number (what is a substances oxidation #)
Oxidizing agent
Reducing Agent
Galvanic/Voltaic Cell
Electrolytic Cell
Anode (AN OX)
Cathode (RED CAT) (Ca+hode)
Inert Electrode
Salt Bridge
Direction of Electron Flow (FATCAT)
Porous Disk or Cup
Cell Potential
Volt (the unit)
Standard Conditions (naught)
Anion/Cation
Standard Cell/Line Notation
How can you tell an electrochemical reaction is spontaneous?
How can you determine which substance is being reduced/oxidized? Use the chart of standard
reduction potentials, or look at the oxidation numbers when given the overall reaction.
http://group.chem.iastate.edu/Greenbowe/sections/projectfolder/flashfiles/electroChem/volticCell.ht
ml Voltaic cell simulator.
1. Consider the voltaic cell: Cd(s) / Cd2+(aq) // Ni2+(aq) / Ni(s) Write the half-cell reactions and the
overall cell reaction. Make a sketch of this cell and label it. Include labels showing the anode, cathode,
and direction of electron flow. Calculate E°cell for this galvanic cell and label it as a voltmeter in your
sketch.
2. Consider the voltaic cell: Zn(s) / Zn2+(aq) // Cr3+(aq) / Cr(s) Write the half-cell reactions and the
overall cell reaction. Make a sketch of this cell and label it. Include labels showing the anode, cathode,
and direction of electron flow. Calculate E°cell for this galvanic cell and label it as a voltmeter in your
sketch.
See text for additional problems:
Page 183, #57, 59
Page 868, #14-22, 26, 28, 34, 36