Arkansas State University Department of Chemistry and Physics

1. Write the cell diagram and calculate the E^o for the Zn/ Zn⁺² and Ca/Ca⁺² half-cells.

2. a) Will I^- react with Br₂?  b) Will Ni⁺² react with Br₂?  c) Will Ni react with Br₂?
d) Will Co⁺² react with Br₂ to give Co⁺³?

3. Rank the following ions from strongest to weakest oxidizing agents:
Li⁺ ; Al⁺³ ; Ag⁺ ; Pb⁺² ; Sr⁺²

4. Calculate DG^o for Cu⁺²/Cu and Mn⁺²/Mn half-cells.  Is this reaction spontaneous?

5. Calculate DG for Ni⁺²/Ni and Fe⁺²/Fe half-cells if the [Ni⁺²] = 0.25 M and the [Fe⁺²] = 0.50 M.

6. Determine the DG for the Al⁺³/Al and Ni⁺²/Ni half-cells.if the [Al⁺³] = 0.50 M and the [Ni⁺²] = 0.25 M.

7. Is the reaction below spontaneous?  Calculate the E^o.

Standard Reduction Potential Table

answers