Identify the ligand(s) and give the coordination number and oxidation number for
ID: 907709 • Letter: I
Question
Identify the ligand(s) and give the coordination number and oxidation number for the central atom or ion in each of the following. (Type your answer using the format +1 and -2 when giving the oxidation number.)
CuEDTA
EDTA4-
Cu2+
EDTA2-
NH3
Cl -
Cr
CrNH3
Co(en)3
Co3+
Co
en
(a) [CuEDTA]2-ligand(s) (Select all that apply.)
CuEDTA
EDTA4-
Cu2+
EDTA2-
coordination number
oxidation number (b) [Cr(NH3)5Cl]2+
ligand(s)
NH3
Cl -
Cr
CrNH3
coordination number
oxidation number (c) [Co(en)3]3+
ligand(s)
Co(en)3
Co3+
Co
en
coordination number
oxidation number
Explanation / Answer
Ligands are ins or neutal molecules which act as Lewis base.
(a) Ligand is EDTA.
Coordination number = 1 ( as 1 molecule of EDTA is present)
Oxidation number is calculated as : x-4 = -2
x = +2
b) Ligand are NH3 and Cl-.
Coordination number = 5 + 1 = 6 ( as 5 molecule of NH3 and 1 molecule of Cl- present)
Oxidation number is calculated as : x-1 = 2+
x = +3
c) Ligand is en
Coordination number = 3x2=6 ( as 3 molecule of en is present each having 2 coordination site)
Oxidation number is calculated as : x+0 = +3
x = +3