Gotham cell: Assorted metal electrodes in sulfuric acid bath.

Gotham cell: Assorted metal electrodes in sulfuric acid bath. The Gotham cell consists of dilute sulfuric acid (6 molar) and 2 electrodes of different conductive materials (zinc, cadmium, tin, iron, aluminum, lead, nickel, copper, silver and carbon). Of the listed electrodes, zinc will be the most negative when inserted in the acid. Carbon will be the most positive. Thus, the cell that will generate the highest voltage will be the zinc-carbon cell, producing about 1.4 volts. All the other combinations of electrodes will yield various smaller voltages. NOTE: The conductive electrodes, listed from left to right (zinc to carbon), are arranged in the decreasing order of their tendencies to pass into ionic form by losing electrons. E.G.: Iron becomes the more negative electrode with respect to copper. (For more explanation, see X and X). To demonstrate depolarization, please request a solution of Potassium Dichromate.