Write a balanced equation for the half-reaction Write a balanced equation for th

Question

Write a balanced equation for the half-reaction Write a balanced equation for the half-reaction occurring at the cathode. Data for the experimental determination of Avogadro's Number and the Faraday Constant are recorded for Trial 1 (see Report Sheet.) in the table. Complete the analysis for those determinations. Report the calculate values with the correct number of significant figures. Determination of Avogadro's Number and the Faraday Constant 1. Initial mass of copper anode (mL) 4. Time of electrolysis (s) 5. Current (or average current) (A, C/s) 6 Final mass of copper anode (g) Data Analysis 1. Mass of copper oxidized at anode (g) 2. Moles of copper oxidized (mol) Show calculations 3. Moles of electrons transferred (mol e^-) Equation 33.4 Show calculations 4. Coulombs passed through cell (C) Equation 335 5. Show calculations 5. Electrons passed through cell (e^-) Equation 335 6. Show calculations 6. Avogadro's number (e^-/mol e^-) Equation 337. Show calculations 9. Percent error 10. Faraday constant (C/mol e^-) Equation 33.8. Show calculations

Explanation / Answer

Mass of Cu oxidized = 2.4852-2.1335 = 0.3517 g

Moles of Cu oxidized = 0.3517/63.5 = 0.00553

Moles of e- transferred = 2*0.00553 = 0.01106

Columbs of charge passed = 1702*0.622 = 1058.64 C

Electrons passed through cell = 1058.64/(1.6*10-19) = 661.65*1019 = 6.616*1021

Avogadro's number = 6.616*1021/0.01106 = 598.19*1021 = 5.98*1023

% error = (6.023-5.98)/6.023 * 100 = 0.713%

Faraday constant = 1058.64/0.01106 = 95717.9

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