Name ________________________________ Chem 178L Spring 2002 Section ________

Concentration Electrochemical Cells Pre-Lab Work in groups of three. GOTO:

Nerst Cell Simulation

1. Start the software and construct a zinc-copper electrochemical cell using 1.0 M Zn²⁺ and 1.0 M Cu²⁺ solutions.

a. What is the EMF of this cell (include units)? ____________________

b. For the voltage that you are measuring, is this E°_cell or E_cell? ________. Explain.

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    c. Write the chemical equation that represents the reaction occurring in this cell.

    

    d. Is this a spontaneous or non-spontaneous reaction? _______________________. Explain.

2. e. Draw a cell diagram for this electrochemical cell.

    

    

    

    f. What is the oxidation half-reaction that occurs and where does it occur? Look at the molecular level animation. The anode is __________.

2. Construct two electrochemical cells such that the EMF of the cells are greater than +1.10 V. Before doing the simulation, predict the EMF of the cells. Prediction ___________ ____________. Explain.

a. Draw the cell diagram for each of the electrochemical cells that you construct.

1.  

   b. What is the EMF of the two cells (include units)? __________ __________

2. c. The voltage that you are measuring, is this E°_cell or E_cell? ________________
3. d. Is this a spontaneous or non-spontaneous reaction? _______________________

    

    e. What is the oxidation half-reaction that occurs and where does it occur? Look at the molecular level animation. The anode is __________.

4. f. Write the chemical equilibrium equation that represents the reaction occurring in this cell.
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7. g. Construct two electrochemical cells such that the EMF of the cells are less than +1.10 V. Before doing the simulation, predict the EMF of the cells. Prediction ___________ ____________. Explain.
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10. h. Draw the cell diagram for each of the electrochemical cells that you construct.

i. What is the EMF of the three cells (include units)? __________ __________ _____________

j. Write the chemical equilibrium equation that represents the reaction occurring in these cells.