Identify which of the following cells correctly represents a concentration cell employing two Pb/Pb²⁺ half-cells with concentrations of 1.5 M and 0.21 M.

Diagram of a concentration cell with 1.5 M and 0.21 M Pb/Pb2+ half-cells.

Diagram of a concentration cell with 1.5 M Pb and 0.21 M Pb2+ half-cells.

Diagram of a concentration cell showing 0.21 M Pb and 1.5 M Pb2+ half-cells.

Diagram of a concentration cell with 0.21 M Pb and 1.5 M Pb2+ half-cells.

Identify which of the following cells correctly represents a concentration cell employing two Pb/Pb2+ half-cells with concentrations of 1.5 M and 0.21 M.