COMEDK · Chemistry · 24. Coordination Compounds
The molar conductivity of the complex \(\mathrm{CoCl}_3 \cdot 4 \mathrm{NH}_3 \cdot 2 \mathrm{H}_2 \mathrm{O}\) is found to be the same as that of a \(1: 3\) electrolyte. The structural formula of the compound is :
- A \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right) \mathrm{Cl}_2\right] \mathrm{Cl} \mathrm{H}_2 \mathrm{O}\)
- B \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}\left(\mathrm{H}_2 \mathrm{O}\right)\right] \mathrm{Cl}_2 \mathrm{H}_2 \mathrm{O}\)
- C \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right)_2 \mathrm{Cl}\right] \mathrm{Cl}_2\)
- D \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right)_2\right] \mathrm{Cl}_3\)
Answer & Solution
Correct Answer
(D) \(\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{H}_2 \mathrm{O}\right)_2\right] \mathrm{Cl}_3\)
Step-by-step Solution
Detailed explanation
The molar conductivity of a \(1:3\) electrolyte indicates that the complex dissociates into \(4\) ions in total, consisting of one complex cation and three chloride anions. This implies that all three chloride ions are present outside the coordination sphere as counter ions. The…
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