Molecules, ions and oxidation?

Question

2IO3- + 12H+ ---> I2 + 6H2O
2I- ---> I2

I have these two balanced chemical equations, in each of them I need to find which ions or molecules are:

1. being oxidized
2. acting as an oxidizing agent
3. acting as an reducing agent

I already know that the Hydrogen ions are not oxidized or reduced, just not really sure what happens with the other molecules and ions...
thanks

Answer 1

The problem is you haven't put the electrons in, so you can't tell which is being oxidised or reduced.

Put 10e- on the left hand side of the first one, and the (IO3)- ion is being reduced.

Pit 2e- on the right of the second one, and that shows the I- ion is being oxidised.

The I- is the reducing agent, and the (IO3)- ion is the oxidising agent.