Problem: Consider the following half-reactions:IrCl63- + 3e- → Ir + 6Cl -         ε° = 0.77 VPtCl42- + 2e- → Pt + 4Cl -       ε° = 0.73 VPdCl42- + 2e- →Pd + 4Cl -      ε° = 0.62 VA hydrochloric acid solution contains platinum, palladium, and iridium as chloro-complex ions. The solution is a constant 1.0 M in chloride ion and 0.020 M in each complex ion. Is it feasible to separate the three metals from this solution by electrolysis? (Assume that 99% of a metal must be plated out before another metal begins to plate out.)

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Problem Details

Consider the following half-reactions:

IrCl63- + 3e→ Ir + 6Cl -         ε° = 0.77 V

PtCl42- + 2e- → Pt + 4Cl -       ε° = 0.73 V

PdCl42- + 2e→Pd + 4Cl -      ε° = 0.62 V

A hydrochloric acid solution contains platinum, palladium, and iridium as chloro-complex ions. The solution is a constant 1.0 M in chloride ion and 0.020 M in each complex ion. Is it feasible to separate the three metals from this solution by electrolysis? (Assume that 99% of a metal must be plated out before another metal begins to plate out.)

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