Multiple choice

According to conductance measurement, how many ions are present in a dilute solution of CoCl3.4NH3?

  1. 2

  2. 3

  3. 5

  4. 6
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A Correct answer
Explanation

CoCl3.4NH3 dissociates in water to give [Co(NH3)4Cl2]+ and Cl- ions, totaling 2 ions per formula unit. Conductance measurements directly count the number of ions produced, not the coordination number. The compound exists as [Co(NH3)4Cl2]Cl, where the complex cation and one chloride ion separate in solution.

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