posted by Val .
H1+(aq) + Fe(s) ==> H2(g) + Fe2+(aq)
I am trying to balance this equation...but I am not sure how to balance the H's.
I have the half rxns as
e- + H+(aq) ==> H2(g)
Fe(s) ==> Fe2+(aq) + 2e-
I multiplied the reduc. rxn (top) by 2 so I could get rid of the electrons...but then I am stuck on what to do with the Hydrogens and where to take it from there. Thanks!
You can't balance the total reaction if you don't have the half cells balanced. And your first one, with H^+, is not balanced.
e + H(aq) ==> H2(g) which becomes
2e + 2H^+ ==> H2(g) and that balances.
The second half cell balances; now you can add the redn half cell to the oxid half cell.