1. The problem statement, all variables and given/known data CuCl2(aq)+Al(s)→AlCl3(aq)+Cu(s) 2. Relevant equations 3. The attempt at a solution I'm just not sure what to do with a situation involving compounds. I can do simple balancing without a problem. Here is my attempt. Please, please let me know where I went wrong... Oxidation: Al→Al+3+3e- Reduction: Cu+2+2e-→Cu Reduction: 2Cl-2→3Cl-3 (?????) I'm confuzzled. I don't know where to go from here, or even if I did the above correctly. The book is pretty awful in describing these half-reaction equations, so I've been searching online but without any applicable results. I didn't think I should split the reduction into two parts, but maybe I do. I don't know. I also don't know what to do with the equation concerning the Chlorine. All around, I'm confused. I can balance the equation just fine with the "trial and error" method, and it matches the back of the book, I just don't know how to get there by half-reactions. Thank you so much for any help.