Make a sketch of a concentration cell employing two Zn/Zn²⁺ halfcells.

The concentration of Zn²⁺ in one of the half-cells is 2.0 M, and the concentration in the other half-cell is 1.0 * 10^-3 M. Label the anode and the cathode and indicate the half-reaction occurring at each electrode. Also indicate the direction of electron flow.