This experiment is intended to be completed by a group of two or three students in a three-hour lab session. As a pre-laboratory assignment, each student is required to create an excel spreadsheet for data collection and calculations. Each group is given 4-5 iron supplement tablets which are pulverized, and acid-digested using ~ 100 mL 1.0 M HCl. This step is followed by gravity filtration of digested samples into a 200 mL volumetric flask. Excess 1.0 M HCl is added to the 200 mL mark. 50 mM FeSO4•7H2O in 1.0 M HCl was used as a standard for quantifying the amount of iron in each tablet. The supporting electrolyte for the cyclic voltammogram experiment was the 1.0 M HCl used for acid digestion and the standard solution.