## I-/I3-

camrynpatterson3C
Posts: 44
Joined: Fri Sep 29, 2017 7:07 am

### I-/I3-

Would the reaction of I- and I3- be an oxidation reaction or a reduction reaction? How would it be either, since both the charges are -1?

Sabah Islam 1G
Posts: 50
Joined: Sat Jul 22, 2017 3:01 am

### Re: I-/I3-

First, you would have to balance the reaction, leading to 3I- arrow I3-. Now, there is a -3 charge on the on the left side and -1 charge on the right side. Then, you would add 2 electrons to the right side so the charges on both side would be -3, leading to this being an oxidation reaction.

Ozhen Atoyan 1F
Posts: 50
Joined: Thu Jul 27, 2017 3:01 am
Been upvoted: 1 time

### Re: I-/I3-

To find whether it is oxidation or reduction you need to have another reaction to compare it to. Then you would look up both of those reactions in the chart with all the half reactions. Whichever has a more negative value that should be the oxidation, and the more positive value should be reduction.

Nhan Nguyen 2F
Posts: 52
Joined: Thu Jul 13, 2017 3:00 am
Been upvoted: 1 time

### Re: I-/I3-

You can tell that this is an oxidation reaction:
I- has an oxidation state of -2
I3- has oxidation of -1 because taken as a whole molecule, each I atom has -1/3 charge