Prelaboratory Questions And Problems

1. Give three examples of real cases where the cementation technique is utilized for the removal and/or recovery of metal ions.

2. If a metal ion (M"+) is to be cemented and it has a standard potential of + 0.50 V (vs the standard hydrogen electrode, SHE), which of the following metals (M2) could be used to achieve that operation? Select the standard potential of the metal half reaction that would be useful, a) 0 V, b) + 0.50 V, c) -0.75 V, d) + 1.00 V vs SHE. Explain.

*3. Predict whether the following reactions are spontaneous or not, assuming T = 25°C and that all concentrations are 1 M. Find the necessary data in any table of standard potentials.

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