What is the coordination number for each of the following complexes or compounds? a) [fe(cn)4(co)2]2âb) [cr(edta)]âc) [zn(nh3)4]2+d) [ag(nh3)2]no3

A) [Fe(CN)₄(CO)₂]²⁻: coordination number = 6.

B) [Cr(EDTA)]⁻: coordination number = 6.

C) [Zn(NH₃)₄]²⁺: coordination number = 4.

D) [Ag(NH₃)₂]NO₃: coordination number = 2.

Explanation:

A) [Fe(CN)₄(CO)₂]²⁻:

In this complex, Fe is bonded with 4 molecules of CN (with 4 coordinate bonds, one bond for each molecule) and 2 molecules of CO (with 2 coordinate bonds, one bond for each molecule) forming the complex with 6 coordinate bonds.

coordination number = 6.

B) [Cr(EDTA)]⁻:

In this complex, Cr is bonded with 1 molecules of EDTA (with 6 coordinate bonds, 4 O atoms and 2 N atoms in EDTA molecule).

coordination number = 6.

C) [Zn(NH₃)₄]²⁺:

In this complex, Zn is bonded with 4 molecules of NH₃ (with 4 coordinate bonds, one bond for each molecule).

coordination number = 4.

D) [Ag(NH₃)₂]NO₃:

In this complex, Ag is bonded with 2 molecules of NH₃ (with 2 coordinate bonds, one bond for each molecule).

coordination number = 2.

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