(B) $1$. Identify the cation: $K^+$ is potassium.$2$. Identify the anion: $[Fe(CN)_6]^{3-}$ is the hexacyanoferrate $(III)$ ion.$3$. Calculate the oxi

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Potassium hexacyanoferrate $(III)$

(B) $1$. Identify the cation: $K^+$ is potassium.$2$. Identify the anion: $[Fe(CN)_6]^{3-}$ is the hexacyanoferrate $(III)$ ion.$3$. Calculate the oxidation state of $Fe$: Let $x$ be the oxidation state of $Fe$. Then $x + 6(-1) = -3$,which gives $x = +3$.$4$. Combine the names: The $IUPAC$ name is Potassium hexacyanoferrate $(III)$.