Rajasthan BoardEnglish MediumSTD 12 ScienceChemistryCoordination Compounds1 Mark
Question
Which of the following will give $Fe^{3+}$ ions in the solution?
✓
Answer
$\ce{[Fe(CN)_6]^{3−}}$ and $\ce{[Fe(CN)_6]^{4−}}$ are complex ions.They retain their identity in the solution.
Hence, they will not give $Fe^{3+}$ ions in the solution.
$\ce{NH_4(SO_4)_2.FeSO_4.6H_2O}$ is a double salt.
In the solution, it breaks into individual ions, but it will give $Fe^{2+}$ ions in the solution.
Similarly, $\ce{Fe_2(SO_4)_{3}}$ also breaks into individual ions.
Hence, they will give $Fe^{3+}$ ions in the solution.
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