In this case, we have a negative six charge and we have the separation of our charge. Now eventually, after some time passes as a result of the tractive forces between the positive and negative as well as the repulsive forces between the negatives and the positives, we basically have the following situation in which we have no charge, no net charge. On the left side, we have three D and three C. And so the charges cancel out and no charge on this side because they cancel out. And so in this scenario, we no longer have an electric gradient. In the same way, in this case, we no longer have our concentration gradient. Now, if we combine the concentration gradient with the electrical gradient, we get the electrochemical gradient.