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Which of the following complex ions produces the highest number of ions in solution, thereby demonstrating the greatest ionic conductivity?

1. K4[Fe(CN)6] dissociates into [Fe(CN)6]4− and 4K+, yielding a total of 5 ions.
2. [Co(NH3)6]Cl3 dissociates into [Co(NH3)6]3+ and 3Cl−, yielding a total of 4 ions.
3. [Cu(NH3)4]Cl2 dissociates into [Cu(NH3)4]2+ and 2Cl−, yielding a total of 3 ions.
4. [Ni(CO)4] does not dissociate into ions.

Correct answer: K4[Fe(CN)6] dissociates into [Fe(CN)6]4− and 4K+, yielding a total of 5 ions.

Solution

K4[Fe(CN)6] dissociates into 5 ions in solution, which is the maximum among the given options, leading to the highest ionic conductivity.

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