Rank the following metals by ease of oxidation, from hardest to easiest: Cu; alu

Question

Rank the following metals by ease of oxidation, from hardest to easiest: Cu; aluminum., Al; Fe; and chromium, Cr. An Al strip is placed in CuSO_4 solution. Would you expect a spontaneous reaction to occur, based on the net potential? If your answer to (1) is "yes", what would you observe? Write a chemical equation that describes your predicted observations. Describe what you would observe if you placed an Ag strip in an aluminum nitrate solution, AI(NO_3)_3. Describe an electrochemical cell that would have the following net equation, by answering the following questions. Fe(s) + Ni^2+(aq) rightarrow Ni(s) + Fe^2+(aq) Write the reduction and oxidation half-equations for the cell. Sketch the electrochemical cell. Identify the components of the cell as in Figure 1. Calculate the expected net voltage for this cell.

Explanation / Answer

1)

Let us get the Eo values:

Eo(Cu2+|Cu) = 0.337 V

Eo(Al3+|Al) = -1.662 V

Eo(Fe2+|Fe) = -0.44 V

Eo(Cr3+|Cr) = -0.74

lower the Eo value easier to oxidise. the rank for hardest to easiest is

Cu Fe Cr Al

I am allowed to answer only 1 question at a time

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