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CHEM107lab11 - Number of Moles of electrons= 0.00116765...

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Paden Allen CHEM 107-513 21 October 2008 Chemistry 107 Lab Report #11: Electroplating and the Measurement of Avogadro’s number Summary The purpose of this lab was to better understand the source of Avogadro’s number and it’s applications in chemistry. To do this, we use the process of electrolysis as a means of determine the numerical value. Experimental Data See Attached Graphs and Data Results Average Current= 0.338 A Total Time= 300 seconds (Current *Time)/ Charge of electron= Number of Electrons reacting Number of Electrons reacting= 6.33*10^20 (Difference in Mass of Copper/Molar Mass of Tin)*2=Number of moles of electrons (The 2 was due to there being a 2+ charge from Copper, thus involving 2 electrons)
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Unformatted text preview: Number of Moles of electrons= 0.00116765 Number of Moles of electrons/Number of electrons reacting= 5.42*10^23 % Error= ((Actual-Exp. Value)/Actual)*100= 9.98% Conclusion The lab was successful in providing a basic understanding of Avogadro’s number and its application in chemistry. Through this experiment, the process of electroplating the copper with tin allowed us to observe electrons moving with a current and thus using our understanding of electrons and electrical charges, we could determine the number of electrons per mole, giving us a constant known as Avogadro’s number....
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