Calculate the coordination number of the metal ion , its oxidation state, number of electrons and number of unpaired electrons in d- orbitals respectively in complex `[Co (H_(2) O)_(4) SO_(4)]Cl`

Options

A. 6,3,6,4
B. 6,3,6,0
C. 5,3,6,4
D. 5,3,6,0

Answer

A

Explanation

Coordination number is the number of ` sigma ` bonds in the coordination sphere . Hence the coordination number of cablt ion in `[Co(H_(2)O)_(4)SO_(3)]Cl` is 6.
Let the oxidation number of Co is x.
`x+4(0) (-2) +(-1) =0`
` x+0-2-1=0,x=3`
number of electrons in d -orbital are six .

Number of unpaired electrons in d-orbital are 4 because `H_(2)O` is a weak field ligand and therefore , pairing of d- electrons in d- orbital is not possible .