Complete the statement regarding the transition metal complex ion [Fe(CN)_6]^{3-} by filli… — JAMB UTME

Complete the statement regarding the transition metal complex ion $[Fe(CN)_6]^{3-}$ by filling in the missing values.

Answer:In the hexacyanoferrate(III) complex ion,

[Fe(CN)_6]^{3-}

, the coordination number of the central iron ion is 【6】 and the oxidation state of iron is 【+3】.

The coordination number of the central iron ion in

[Fe(CN)_6]^{3-}

is 6, and its oxidation state is +3.

[Fe(CN)_6]^{3-}

, iron is bonded to six cyano (

CN^-

) ligands, establishing a coordination number of 6. Balancing the total charge gives

x + 6(-1) = -3

, yielding an oxidation state of +3 for the iron central metal ion.

Determine the coordination number from the formula of the complex ion.

The central iron ion is bonded to 6 monodentate cyano (

CN^-

) ligands, so the coordination number is 6.

The coordination number represents the total number of ligand donor atoms attached directly to the central transition metal ion.

Calculate the oxidation state of the central iron ion.

Let

x

be the oxidation state of

Fe

. Each cyano ligand has a charge of

-1

, and the total complex ion charge is

-3

. Setting up the equation:

x + 6(-1) = -3 \implies x - 6 = -3 \implies x = +3

The sum of the oxidation state of the central metal and the charges of all ligands equals the net charge of the complex ion.

Coordination Number and Oxidation State Determination in Complex Ions

Question