The only difference is that now we have the same exact electrode. So this electrode might be composed of some metal x, and this electrode is also composed of that same metal. So now we have the same type of reaction occurring in Baker One and Baker Two. The only difference is we have different concentrations of solutions because we learned from this equation that even though this guy might be zero, the concentration difference will still create an electric potential or cell voltage. Now, what is this guy for, this type of electrochemical cell called the concentration cell? Well, let's see.