1. The problem statement, all variables and given/known data HIO3 + FeI2 + HCl ==> FeCl3 + ICl + HOH 2. Relevant equations Directions say it's in an aqueous solution, and HCl is a reactant, so you can add H2O and H+ to balance, right? 3. The attempt at a solution I first found all the oxidation states: HIO3 H = +1 I = +5 O = -2 FeI2 Fe = +2 I = -1 HCl H = +1 Cl = -1 FeCl3 Fe = +3 (oxidation) Cl = -1 ICl I = +1 (reduction) Cl = -1 HOH H = +1 O = -2 Then tried writing/balancing the half reactions. FeI2 ==> FeCl3 + e- But I'm kind of stuck here, can I use HCl to balance? How else do I balance that Cl? And what about the I?