And on the other side, the right side, we have 6D molecules that each have a negative one charge. Once again, we are separated by a semipermeable membrane that allows both of these molecules to pass through. So in this case, molecule C has a positive charge and molecule D has a negative charge. Both molecules will move down their electrical gradient and this movement is a result of the electric attractive and repulsive forces that exist in nature. Molecule C moves to the right while molecule D will move to the left until the electric charge basically equilibriates between our two sides. So in this case, we have a positive six charge.