alleryIn the coordination compound K₃[Fe(CN)₆], the coordination sphere is:
AFe³⁺
BCN⁻ only
CK₃
D[Fe(CN)₆]³⁻
Answer & Solution
Correct answer: D. [Fe(CN)₆]³⁻
**Coordination sphere** = central atom + ligands within the square brackets = **[Fe(CN)₆]³⁻**.
K⁺ is the **counter ion** (outside the brackets).
The coordination number of Fe³⁺ is 6.
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