[sherman]

Why does ferrous iron readily spontaneously oxidize to ferric iron in the presence of oxygen at neutral pH but not at acidic pH?

[fyodor.pav]

This is from wikipedia...

http://en.wikipedia.org/wiki/Ferric

"A salt (chemistry) of ferric iron hydrolyzes water and produces iron(III) oxide-hydroxides while contributing hydrogen ions to the solution, lowering the pH compared to a solution of equal molarity (based on the anion concentration) solution of the analogous sodium or potassium salt."

So my guess (guess being the key word) is the lower the pH the less likely it is to hydrolyze water..?