IUPAC name of the complex, K3FeCN6 is

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Potassium hexacyanido ferrate(III)

tripotassium hexacyanido ferrate(III)

Potassium hexacyanido ferrate(II)

Potassium hexacyanato ferrate(II)

answer is A.

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Detailed Solution

CN-…cyanido or cyano(preferably cyanido)…uninegative ligand ;Oxidation state of iron is “+3” ;Counter ion is potassium ion and while naming the counter ion prefixes like di, tri…should not be used;Complex ion is an anion, it should be written after name of cation;While naming the complex, ligands are named first (in alphabetical order with proper prefixes) followed by metal ion with its oxidation state as roman number in parenthesis;While naming the metal ion of an anionic complex the suffix “ate” is used;

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