Question

Il Kaview Constants I Fer Part A A complex ion is a species in which a central metal ion is allached to a group af surrounding ions or molecules by coordinata covalent bonds. The surrounding species are called Ngand's. Within eigand, the atoms that are directly attached to the metal ion (or atom) are called danar atoms. Most lipands cantain a single donor atam monarentats), but some contain tad donor atoms bidentatel six donor atoms (hexadentale), or another combination of coror stoms. A complex jan that is associated with one or more counter ions is called a coordination compound. For example PAOL1" is a complex on and Na Pachis coordination compound. The following table lists some common ligands. Ligand Number of donor atoms What is the coordination number for cach af the following complexes or compounds? A. Co(NH) CL] B. Ca(EDTA) CPU(NH),12 D. NaſAg(CN),1 Enter the coordination numbers, in the order that the complexes are listed, as four Integers separated by commas (6.g. 1,2,3,4), View Available Hints) Ci Br 1 CO, Submit EDTA- NH HO CO Part B The coordination number for a complex is the total number of donar atoms surrounding the central atom. The overall charge on a complex is the sum of the charges of the metal and all the ligands. What is the charge on each of the following complex ons? A. hexaequairon in). [Fe(H2O)? B. trisícarbonato)aluminate(ll). Al(CO3) C. arrminepentachiloroplatinate(IV). P!(NH, CI Express the charges numerically, in the order that the complexes are listed, separated by commas. For a nonzero charge, be sure to include the sign (e-g-, +1, -2,+3). View Available Hints) Sutrnil

What is the coordination number for each of the following complexes or compounds?

1. [Co(NH3)4Cl2]+
2. [Ca(EDTA)]2−
3. [Pt(NH3)4]2+
4. Na[Ag(CN)2]

Enter the coordination numbers, in the order that the complexes are listed, as four integers separated by commas (e.g., 1,2,3,4).

What is the charge on each of the following complex ions?

1. hexaaquairon(II), [Fe(H2O)6]?
2. tris(carbonato)aluminate(III), [Al(CO3)3]?
3. amminepentachloroplatinate(IV), [Pt(NH3)Cl5]?

Express the charges numerically, in the order that the complexes are listed, separated by commas. For a nonzero charge, be sure to include the sign (e.g., +1,-2,+3).

Answer 1

1.

What is the coordination number for each of the following complexes or compounds?

1. [Co(NH₃)₄Cl₂]+ : 6 monodentate ligands ( 4 x (NH₃) + 2 x (Cl-) )in coordination sphere so, coordination No. = 6
2. [Ca(EDTA)]²⁻ : EDTA is a hexadentate ligand ; thus , coordination No. = 6
3. [Pt(NH₃)₄]2+ : 4 monodentate ligands ( 4 x (NH₃) ) in coordination sphere so, coordination No. = 4
4. Na[Ag(CN)₂] : 2 monodentate ligands ( 2x (CN) ) in coordination sphere so, coordination No. = 2

2.

What is the charge on each of the following complex ions?

1. hexaaquairon(II), : [Fe(H2O)₆]²⁺ : charge on metal ion = +2 , charge on ligand = 0 : so charge on complex ion = +2
2. tris(carbonato)aluminate(III), [Al(CO₃)₃]^3- :  charge on metal ion = +3 ,

charge on ligand = (-2 x 3 = -6) : so charge on complex ion = -3

3 . amminepentachloroplatinate(IV), [Pt(NH₃)Cl₅]^- =

charge on metal ion = +4 ,

charge on ligand = (-1 x 5 = -5 + 0 ) : so charge on complex ion = -1