Question

Lab 11: Shadying E Halt Cells and Halt-R Pre-Laboratory Assignment ruse Table 1 as a source of half-equations and reduction potentials for this assignment) 1. Rank the following metals by ease of oxidation, from hardest to easiest: Cu; aluminum, Al; Fe; and chromium, Cr shil 2. An Al strip is placed in Cuso, solution. ) Would you expect a spontaneous reaction to occur, based on the net potential? (2) If your answer to (1) is "yes," what would you observe? (3) Write a chemical equation that describes your predicted observations. 3. Describe what you would observe if you placed an Ag strip in an aluminum nitrate solution, AI(NO3)3- custom page 149

Answer 1

1. Oxidation is the process of removal of e- .

Cu ,Al , Fe and Cr

Cu = 3d^10 4s^1

Al = [Ne]3s^2 3p^1

Fe = 3d^6 4s^2

Cr = 3d^5 4s^1

Hence Al has highest ease of oxidation as removal of e- from p-orbital is easy than s-orbital.

Next to it is Cr dur to small size .

Next is Fe and hardest is Cu .

Hence ease of oxidation from hardest to easiest is ;

Cu <Fe<Cr<Al .