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Answers for Faraday’s Constant and Avogadro’s Number Lab
Outline
Data Analysis Table
Calculations
Post-Lab Question
Answers for Faraday’s Constant and Avogadro’s Number Lab
Data Analysis
Initial mass of Cu electrode
Final mass of Cu electrode
Mass of Cu lost
Average current
Time of current application
Total charge transferred
Number of e- produced based on
total charge transferred
Mole of e- produced based on
mass of Cu electrolyzed
Experimental Faraday’s
Constant
Ave. experimental Faraday’s
Constant
Standard Deviation of Faraday’s
Constant
Percent error
[Accepted value for Faraday’s =
96485 C/mole e-]
Number of Cu atoms lost from
anode
Number of Cu atoms lost per g
Cu electrolyzed
Number of Cu atoms per mole
Cu
Ave. Experimental Avogadro’s
Number
Standard deviation of
Experimental NA
Percent error
[Accepted value for NA = 6.022
x 1023]
Trial 1
17.3241 g
17.2993 g
0.0248 g
0.4065 A
1.80 x 102 s
73.2 C
4.57 x 1020 e-
Trial 2
17.2928 g
17.2675 g
0.0253 g
0.4028 A
1.80 x 102 s
72.5 C
4.53 x 1020 e-
Trial 3
17.2709 g
17.2475 g
0.0234 g
0.3911 A
1.80 x 102 s
70.4 C
4.39 x 1020 e-
7.80 x 10-4 mol e-
7.96 x 10-4 mol e-
7.36 x 10-4 mol e-
93.8 x 103 C/mol
e-
91.1 x 103 C/mol
e-
95.7 x 1...