Lab Report11 - Lab Report#11 Experiment Electroplating and...

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Lab Report #11 Experiment: Electroplating and the Measurement of Avogadro’s number Prepared by: Marat Seitimov Section: 538 Date perfomed: 03/18/08 Summary: In this experiment we deposited tin onto a piece of copper by the electrolysis of a tin (II) solution. We measured the electric current that flows through the solution and the time over which the experiment was run, and then from these results calculated the value of Avogadro’s number. We also explored the effect of solution concentration and current on the physical characteristics of the tin film. We made a reaction of a electroplating – the deposition of a tin film onto copper metal. The reaction was fairly simple. Tin ions from solution were reduced, forming tin metal at the copper electrode (called the cathode). At the tin electrode (called the anode), tin metal was oxidized to produce tin ions in the solution. We obtained strips of copper and tin metal, which served as the electrodes of our electrolysis cell. We cleaned our electrodes with acids. Then we measured their weight, and placed electrodes into solution away from each other because it can create a “short circuit”.
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