question archive 1) (Part I) Compare the average cell potential, for your Cu/Pb cell, with the E°cell that you calculated in the pre-lab exercise
1) (Part I) Compare the average cell potential, for your Cu/Pb cell, with the E°cell that you calculated in the pre-lab exercise
Subject:ChemistryPrice: Bought3
1) (Part I) Compare the average cell potential, for your Cu/Pb cell, with the E°cell that you calculated in the pre-lab exercise. Explain why your cell potential is different from the text value.
2. (Part II) The unknown metals X and Y were either magnesium, silver, or zinc. Use the text value for the reduction potential of Pb and the measured cell potentials for the unknowns to identify X and Y.
3. (Part III) Use the Nernst equation to calculate the theoretical value of E of the copper-concentration cell and compare this value with the cell potential that you measured.
4. (Part III) Use the Nernst equation and the information that you collected about the Pb/PbI2 cell to complete the following calculations.
a. Use the cell potential for the Pb-PbI2 cell and the known [Pb2+] to calculate the [Pb2+] in equilibrium with PbI2.
b. Use the original diluted [Pb2+] and [I–] to calculate the [I–] in solution.
c. Use your data to calculate the Ksp of PbI2.
d. The accepted value of the Ksp of PbI2 is 9.8 × 10–9. How does your experimental Ksp of PbI2 compare with the accepted value?
