alleryName of complex K3[Fe(CN)6]:
APotassium ferrocyanide
BPotassium iron cyanide
CPotassium hexacyanoferrate(III) or potassium ferricyanide
DIron potassium cyanide
Answer & Solution
Correct answer: C. Potassium hexacyanoferrate(III) or potassium ferricyanide
K3[Fe(CN)6]: 3 K⁺ counter ions, complex anion [Fe(CN)6]³⁻.
CN⁻ × 6 = -6, charge -3
→ Fe oxidation state = +3. IUPAC: potassium hexacyanoferrate(III).
**Old name:** potassium ferricyanide.
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