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In Part I of this experiment, metal/ion half-cell combinations will be tried.The Nernst Equation Theoretical predictions of tendency to gain electrons are used to predict the voltage difference between two electrodes.Under standard conditions (25 ?C, 1 M solution concentration, 1 atm gas pressure),these theoretically predicted voltages are known as standard emfs ( or E?cell ).From the data, a table will be developed, listing various elements and ions in order of their tendency to gain or lose electrons.The Nernst Equation allows cell voltages to be predicted when the conditions are not standard.Walter Nernst developed the following equation in the late 1800's while studying the thermodynamics of electrolyte solutions:

In Part I of this experiment, metal/ion half-cell combinations will be tried. From the data,
a table will be developed, listing various elements and ions in order of their tendency to
gain or lose electrons.
The Nernst Equation
Theoretical predictions of tendency to gain electrons are used to predict the voltage
difference between two electrodes. The voltage difference between electrodes, the cell
voltage, is also called the electromotive cell force, or emf (or E ). Under standard
conditions (25 °C, 1 M solution concentration, 1 atm gas pressure),these theoretically
predicted voltages are known as standard emfs ( or E°cell ).
In reality, standard conditions are often difficult, if not impossible, to obtain. The Nernst
Equation allows cell voltages to be predicted when the conditions are not standard.
Walter Nernst developed the following equation in the late 1800's while studying the
thermodynamics of electrolyte solutions: