write the formulas of the complex ion formed between

a) the ligand, Cl-, and the platinum(II) ion with a coordination number of four.

b) the ligand, NH3, and the nickel(II( ion with a coordination number of six.

c)the ligand, ethylenediamine, and the chromium (III) ion with a coordination of number six.

d) the ligand, dihydrogen ethylenediaminetetraacetate, abbreviated H2Y^2- and the zinc(II) ion with a coordination number of four.

a) To determine the formula of the complex ion formed between the ligand Cl- and the platinum(II) ion with a coordination number of four, you need to consider the charge of the platinum ion and the number of ligands.

Given that Cl- is a monodentate ligand that forms a single bond with the metal ion, and platinum is in its +2 oxidation state, you can use the formula:

[PtCl4]2-

In this formula, [ ] represents the complex ion, Pt represents the platinum ion, and Cl represents the chloride ligands.

b) For the complex ion formed between the ligand NH3 and the nickel(II) ion with a coordination number of six, you need to consider that NH3 is a neutral, monodentate ligand.

Since nickel is in its +2 oxidation state, and NH3 forms a single bond with the metal ion, the formula of the complex ion can be written as:

[Ni(NH3)6]2+

In this formula, [ ] represents the complex ion, Ni represents the nickel ion, and NH3 represents the ammonia ligands.

c) To find the formula of the complex ion formed between the ligand ethylenediamine and the chromium (III) ion with a coordination number of six, you need to consider the charge of the chromium ion and the coordination number.

Since ethylenediamine is a bidentate ligand (forms two bonds with the metal ion), and chromium is in its +3 oxidation state with a coordination number of six, the formula of the complex ion can be written as:

[Cr(en)3]3+

In this formula, [ ] represents the complex ion, Cr represents the chromium ion, and en represents the ethylenediamine ligands.

d) For the complex ion formed between the ligand dihydrogen ethylenediaminetetraacetate (H2Y^2-) and the zinc(II) ion with a coordination number of four, you need to consider the charge of the zinc ion and the coordination number.

Since dihydrogen ethylenediaminetetraacetate is a hexadentate ligand (forms six bonds with the metal ion), and zinc is in its +2 oxidation state with a coordination number of four, the formula of the complex ion can be written as:

[Zn(H2Y)]2-

In this formula, [ ] represents the complex ion, Zn represents the zinc ion, and H2Y^2- represents the dihydrogen ethylenediaminetetraacetate ligand.