LAB REPORT#11

LAB REPORT#11 - LAB REPORT #6 Experiment: Electroplating...

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Experiment: Electroplating and the measurement of Avogadro’s number Name: Galym Kenenbayev Lab Partner: Brandon Bjork Date performed: 10/18/2007 Summary: In this experiment we learnt how the process of electrolysis occurs and by using electrolysis we can obtain Avogadro’s number. We deposited pieces of copper and tin into the tin solution and let the electric current flow through the solution. This was the process of electrolysis. Further, by measuring this electric current we calculated the Avogadro’s number. Although we had not perfect conditions for the experiment, we obtained quite good results. (N A =6.88*10 23 ). Results: m i (Sn) 0.63g m i (Cu) 0.773g m f (Sn) 0.546g m f (Cu) 1g Total charge 156 C C(SnCl 2 ) of 40 ml 1.0M e - = 1.602*10 -19 C Calculations: 1. m(Sn)=0.63g-0.546g=0.084g n(Sn)=0.084g / 118.71g/mole=7*10 - 4 mole The mass change is very small and the masses are almost the same because electrons gained or lost are very tiny particles, so the mass change is not so large. 2.
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LAB REPORT#11 - LAB REPORT #6 Experiment: Electroplating...

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