concentration related to current?

[Vuong_2F]

how do the concentrations change as current flows from anode to cathode?

[Eugene Chung 3F]

electrons will flow from area of high concentration to an area of low concentration. So, the concentration difference makes potential.

[Ellen Amico 2L]

If you mean for a concentration cell, the solution of lower concentration will be the product because it will be increasing in concentration. The higher concentration solution will decrease in concentration, so it's the reactant. A voltage will be created as electrons flow from anode to cathode since both solutions are reaching equilibrium.

[Vuong_2F]

electrons will flow from area of high concentration to an area of low concentration. So, the concentration difference makes potential.

so once there is no concentration difference, there is no more potential?

[Eugene Chung 3F]

electrons will flow from area of high concentration to an area of low concentration. So, the concentration difference makes potential.

so once there is no concentration difference, there is no more potential?

Yup.