Attach all of your work and answers.
1. Sketch an electrolytic cell (use graphite electrodes) in which the following reaction occurs:
2 I - + 2 H2O à H2 + 2 OH - + I2
a) Label the cathode and the anode
b) Indicate the charges on the electrodes
c) Write the corresponding half reactions next to each electrode.
2. Balance the cell reaction and sketch a voltaic cell for the following cell reaction:
Cr + Cu2+ à Cr3+ + Cu
a) Label the cathode and the anode
b) Indicate the charges on the electrodes
c) Write the corresponding half reactions next to each electrode.
d) Indicate the flow of electrons
e) Indicate the flow of cations and anions
f) What does n equal for this reaction?
3. Calculate Eo, E and DG (in kJ) for the following cell reaction (written in cell notation) at 298K. Is this a voltaic cell or an electrolytic cell?
Zn / Zn2+(0.10 M) // Al3+ (0.10 M) / Al
4. What is the cell reaction and the Eo cell for the electrolysis of 1.0 M NaBr ?
5. Calculate the Ksp for X(OH)2 from the following experimental data. A cell voltage of 0.345 V was measured after 0.500 M NaOH was added to the anode of the following cell.
X / X2+( ?? M) // X2+ (0.10 M) / X