Electrochemical Cells
by Gary L. Bertrand
University of Missouri-Rolla
Background                Acknowledgement                Simulation

This is an interactive simulation of electrochemical cells, involving various metal electrodes.  The electrode is immersed in a solution of its nitrate salt.  Various cells may be constructed and the expected voltage of a cell is displayed.  Calculations are based on the Nernst Equation using reasonable approximations for activity coefficients and the assumption of zero junction potential across the sodium nitrate salt bridge.  Cells may be constructed in order to solve problems presented at several levels, using measured voltages and an abbreviated Table of Standard Reduction Potentials, included in the program

Level:
(0)  The student may construct cells with various electrodes (including the Pt/Hydrogen
electrode) and concentrations, and the voltages of these cells may be measured.

(1)  A cell is presented, and the student is asked to calculate the cell's standard potential (Eo).

(2)  There is a fictitious metal/salt pair, Whodatium (Wd)/Whodatium (II) Nitrate.  The user
is asked to determine the standard reduction  potential
(Eo) for this pair.

(3)  The student is asked to design a cell which will produce a specified standard potential (Eo).

(4)
A cell is presented (with concentrations), and the student is asked to calculate the
expected voltage
(E) of the cell.

(5)  The electrode menu contains five fictitious metals:  Fonium (Fo), Imagium (Im),
Mysterium (My), Oddmium (Od), and Whodatium (Wd).  These metals have different
properties in each problem.  The user is asked to determine the activity series for these
metals.  In the activity series, the most active metal has the most negative reduction
potential and the least active metal has the most positive reduction potential.

(6)  The user must determine the mean ionic activity coefficient of Whodatium (II) Nitrate
in a 1.00 M solution.   (Physical Chemistry Level)

Answers to the problems are checked by the program.

Thanks to Michael Cheney, AP Chemistry Instructor at Crestview High School, Crestview, FL
for the idea for this simulation, and for many helpful suggestions in the development.