Postlaboratory Problems And Questions

*1. Write a general equation for the removal of a metal ion, M^ from an aqueous solution by cementation on a solid metal, N|'s) that becomes N^.

*2. Comment on any possible deviations from linearity in your kinetic plot.

*3. During the removal of Cu2+ ions by cementation on elemental Fe, the following reactions occur:

If the system is allowed to reach thermodynamic equilibrium, then the concentration of Cu2+ ions will be greatly reduced, whereas the concentration of Fe2+ will increase.

What will be the ratio of the concentrations at equilibrium, Q = [Fe2+]/[Cu2+]?

(Note: Assume that the concentrations of the ions are approximately the same as their activities).

* Answer in this book's webpage at

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