Information pertains to electrochemistry lab. DATA Data Table 1 Data Table 2 CAL
ID: 532068 • Letter: I
Question
Information pertains to electrochemistry lab.
DATA
Data Table 1
Data Table 2
CALCULATIONS
Lab reference:
http://www.webassign.net/labsgraceperiod/ucscgencheml1/lab_13/manual.html
______________________________________________________
Task:
1. Show setup or Nernst equation with all known variables entered using data from Zn/Zn2+ from Table 2. Determine calculated [Cu2+].
2. Show setup of Nernst equation with all known variables entered using data from Ag/Ag+ from Table 2. Determine calculated [Cu2+].
Metal Mg Ag Ni Zn Cu Pb Mg X 1.77 1.00 0.60 1.43 0.93 Ag X X 0.22 0.94 0.37 0.92 Ni X X X 0.31 0.20 0.19 Zn X X X X 0.52 0.17 Cu X X X X X 0.35 Pb X X X X X XExplanation / Answer
From the given data
Nernst equation using Zn/Zn2+ from Table 1,
E = Eo - 0.0592/n logQ
Q = 1 so, log Q = 0
E = Eo
For Zn/Cu cell,
0.52 = Ecathode - Eanode
Nernst equation using Ag/Ag+ from Table 2,
E = Eo - 0.0592/n logQ
Q = 1, log Q = 0
For Ag/Cu cell,
0.55 = Ecathode - Eanode
So Eo for [Cu2+] = 0.55 - (0.52) = 0.03 V
Ag+ would oxidize Cu, Cu2+ would oxidize Zn