Quick note: Sorry for dominating the homework help board, guys! But, I wanted to say thank you to everyone who replies to my excessive questions. This forum's input has become integral to me as I am in a position now where I can't go to my teacher for help because of the logistics of commuting :(. SO, THANKS! 1. The problem statement, all variables and given/known data Redox or not? Ammonium chloride, dissolved in water 2. Relevant equations n/a 3. The attempt at a solution I think...when we dissolve, the salt dissociates into its ions. NH4+Cl---water--> NH4+ + Cl- (If this is the case, no redox.) But, are we considering some sort of substitution reaction with water's ions? NH4Cl+H2O = NH4+ + Cl- + H2O = NH4+ + HCl + OH-? OR NH4Cl + H2O = NH4 + Cl- + H2O = NH3 + HCl + H2O I'm not quite sure how this would proceed...But, in both, Cl is not oxidized or reduced. In one, NH4 stays the same (+1 charge). And in one, H2O lost a proton, so it was...reduced?