# Homework Help: Redox Reaction Problem

1. Jul 19, 2008

### cncbmb

1. The problem statement, all variables and given/known data

Give the net redox equations for the following reactions which occur in base solution.
$$Fe(OH)_2+ O_2 \rightarrow Fe(OH)_3$$

2. Relevant equations
none

3. The attempt at a solution
The oxidation half reaction is $$Fe(OH)_+OH^{-1}\rightarrow Fe(OH)_3 + e^{-}$$.

How do we find the reduction reaction?

2. Jul 19, 2008

### symbolipoint

Possibly oxygen is being reduced. Could one-half mole of oxygen be a good fit? Work from there and see what you find.

3. Jul 19, 2008

### cncbmb

How would we work with this problem using moles? How could we test of one half mole of oxygen would be "a good fit?"

How would we know what that $$O_2$$ would turn into after being reduced?

4. Jul 19, 2008

### symbolipoint

The most obvious half reactions might be these:

Fe(OH) sub 2 + 1OH (-1 charge) ----------> Fe(OH) sub 3 +1e

O + H2O +1e ----------------> 2OH (-1 charge)
The single "O" is used here to show one half of the oxygen diatomic molecule. Right now, I do not have access to good typesetting. Understand, too that "sub x" means subscript of x.

Someone else might like to give further or better details, since I'm not too aware of much about Iron chemistry and reactions.