Consider a concentration cell comprised of two separate nickel electrodes dipped into two stable aqueous Ni⁺² salt solutions that differ in concentration. Which statement below is true regarding this concentration cell?

Question

Quizplus · Accepted Answer

In a concentration cell, electricity flows from the lower concentration compartment to the higher concentration compartment until both concentrations are equal. This occurs because the concentration gradient creates a potential difference between the two electrodes, which drives the flow of electrons. Once the concentrations are equal, there is no potential difference and no further flow of electrons. Option A and B are not correct because the flow of electrons will not stop until both concentrations are equal, not just until the lowest concentration is depleted. Option D is also incorrect for the same reason. Option E is incorrect because even if both electrodes are made of the same material, there will still be a concentration gradient between the two compartments if the solutions have different concentrations.

Consider a Concentration Cell Comprised of Two Separate Nickel Electrodes