## Oxidation Number vs. Coordination Number

Rachel Yu 1G
Posts: 113
Joined: Fri Aug 09, 2019 12:15 am

### Oxidation Number vs. Coordination Number

What is the difference between oxidation numbers and coordination numbers?

Alexa Mugol 3I
Posts: 54
Joined: Sat Aug 17, 2019 12:17 am

### Re: Oxidation Number vs. Coordination Number

Oxidation number is the charge of the transition metal in the center of the coordination compound. Coordination number is the number of bonds from the central metal atom.

Sanjana K - 2F
Posts: 102
Joined: Sat Sep 07, 2019 12:17 am
Been upvoted: 1 time

### Re: Oxidation Number vs. Coordination Number

Here's an example of a problem involving coordination numbers:
In Co(NH3)6, the coordination number is 6 because you have 6 ligands attached to the central atom Co. CO3 (2-) has a coordination number of 3 because of the 3 oxygens surrounding the carbon atom. You can relate coordination numbers to molecular geometry.

Here's an example of a problem involving oxidation numbers:
If you want to find the oxidation number for Cr in CrCl3, you have to start off by figuring out the charges you DO know (the charges of the non-TM ions). Group 17 elements have an oxidation number of -1 so 3(-1) = -3. The charge of the overall molecule is 0 and we only have one Cr atom, so the charge of the Cr atom is +3 to make the molecule neutral in charge.

905416023
Posts: 54
Joined: Thu Jul 25, 2019 12:17 am

### Re: Oxidation Number vs. Coordination Number

I am also extremely confused on this. Is this something we are going to have to know for the final?

DMuth_1J
Posts: 63
Joined: Thu Jul 11, 2019 12:15 am

### Re: Oxidation Number vs. Coordination Number

if coordination number is the number of bonds, then what is valence?

Michelle Song 1I
Posts: 102
Joined: Thu Jul 11, 2019 12:17 am

### Re: Oxidation Number vs. Coordination Number

DMuth_1J wrote:if coordination number is the number of bonds, then what is valence?

Valence is the number of electrons an atom/ion has in their outer shell

Jack Riley 4f
Posts: 100
Joined: Sat Aug 24, 2019 12:17 am

### Re: Oxidation Number vs. Coordination Number

oxidation number is the charge of the central transition metal ion. Coordination number is the number of bonds the central ion forms in the compound

Brittany Tran 3I
Posts: 50
Joined: Sat Jul 20, 2019 12:16 am

### Re: Oxidation Number vs. Coordination Number

oxidation number is the charge on the ion. coordination number is the number of covalent bonds connecting the central ion to the ligands in a coordination compound

Angela Patel 2J
Posts: 110
Joined: Sat Aug 24, 2019 12:17 am

### Re: Oxidation Number vs. Coordination Number

why is it called oxidation number if it is just the charge on the ion/transition metal?