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20 February, 15:12

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

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  1. 20 February, 15:21
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    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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