I saw this more related to physics than chemistry. So I have been trying to model how the voltage is generated in galvanic. I couldn't find any online and I thought it would be a good exercise. I modeled ions as electric charges with different magnitude of charge. Each producing a different electric field depending on the nature of its components. For example Cu+2 has a strong electric field than Zn+2 which would explain the voltage. Now I started to think about these electrical charges affect each other and said that there must be effect on each other because on such small scales the ions can do that. This would explain the higher concentration we have the higher the voltage is. All this interference and ions moving around, Somehow they behave like a terminal so that the voltage is constant. Then I faced a problem, It seems that in questions they don't care about the effect of negative charges and their electric field. As though it wasn't even there. My question why is that? When they give us that the "Standard" voltage of Cu-Zn cell is 1.1 volts does that mean this is purely because of the interaction between positive ions? Perhaps someone can set me straight and show the mistakes in my model.