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Chapter 48: Problem 11

If possible, rank the metal ions \(\mathrm{Ni}^{2+}, \mathrm{Cu}^{2+}, \mathrm{Cr}^{3+}\), and \(\mathrm{K}^{+}\) in terms of their strength as oxidizing agents. If this is not possible, rank as many as you can and propose an experiment (or series of experiments) that would enable you to complete the rankings.

Short Answer

Expert verified
The exact ranking would depend on the values in the standard reduction potentials table. For proposing an experiment, one could use a common reducing agent and observe which ion reacts fastest as an indicator for its oxidizing strength.

Step by step solution

01

Refer to Standard Reduction Potentials Table

Look up the standard reduction potentials for these ions in a standard reduction potentials table. Standard reduction potentials are given for the reduction half-reaction, which is what we want for the ion acting as an oxidizing agent.
02

Rank the Metal Ions

The higher the standard reduction potential, the more easily the ion is reduced, and therefore, the stronger it is as an oxidizing agent. Rank the ions from highest to lowest reduction potential.
03

Propose an Experiment

If there is a tie in reduction potentials or if the reduction potentials for some ions are not available, design an experiment to differentiate their oxidizing strengths. An experiment might involve a series of redox reactions with a common reducing agent and monitoring which reaction proceeds fastest, indicating the strongest oxidizing agent.

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How many electrons are transferred when: a) one \(\mathrm{Zn}\) atom reacts with one \(\mathrm{Cu}^{2+}\) ion? b) one mole of \(\mathrm{Zn}\) reacts with one mole of \(\mathrm{Cu}^{2+}\) ?
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