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Platinum Foil Source: Leftover from Lab Experiment Purity: 99.9% This piece of Platinum foil was left over from an experiment. Platinum is often used as electrodes in electrochemical experiments because of its incredible resistance to corrosion and its high current density for many reactions. Pieces with an exactly determined surface area are often cut out for quantitative studies, and the scraps end up being not very useful. However, they don't stop being valuable! This sample weighs about 0.5g, making it's current market value (Sep. 3, 2007) about $20. |