The titration solution in the cell below had a total volume of 50.0 mL and contained 0.100 M Mg2+ and 1.00 x 10-5 M Zn(EDTA)2- at a pH of 10.00 s.C.E. || Zn(s) | titration solution Zn2* + 2e- Zn(s) E' = -0.762 v Mgy2-: Kf = 6.2 x 108; Zny2-: Kf = 3.2 x 1016. What will be the cell voltage when 10.0 mL of 0.100 M EDTA has been added? (Hint: Se Exercise 15-B.) i) Total mmoles of Mg*2 ii) mmoles of EDTA added is iii) mmoles of Mg*+2 reacting with EDTA

Principles of Instrumental Analysis
7th Edition
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
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Chapter24: Coulometry
Section: Chapter Questions
Problem 24.12QAP
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The titration solution in the cell below had a total volume of 50.0 ml and contained
0.100 M Mg2+ and 1.00 x 10-5 M Zn(EDTA)2- at a pH of 10.00
s.C.E. || Zn(s) | titration solution
Zn2* + 2e- Zn(s) E' = -0.762 v
MgY2-: Kf = 6.2 x 108; Zny2- : Kf = 3.2 x 1016.
What will be the cell voltage when 10.0 mL of 0.100 M EDTA has been added? (Hint: See
Exercise 15-B.)
i)
Total mmoles of Mg*2
mmoles of EDTA added is
mmoles of Mg*2 reacting with EDTA
iv)
mmoles of MgY2-
v)
Concentration of MgY2- in M
vi)
mmoles of excess unreacted Mg+2
vii)
Concentration of Mg*2 in M
viii)
Concentration of EDTA (Y4-) in M
ix)
Total mmoles of Zn+2{1:NUMERICAL:%100%0.500:0.15}
x)
mole of Zny2- in M
xi)
Concentration of ZnY2- in M
xii)
Concentration of Zn2+ in M
xiii)
Potential of the cell in voltage, Ecell={1:NUMERICAL-1.364:0.1}
13 marks
Transcribed Image Text:The titration solution in the cell below had a total volume of 50.0 ml and contained 0.100 M Mg2+ and 1.00 x 10-5 M Zn(EDTA)2- at a pH of 10.00 s.C.E. || Zn(s) | titration solution Zn2* + 2e- Zn(s) E' = -0.762 v MgY2-: Kf = 6.2 x 108; Zny2- : Kf = 3.2 x 1016. What will be the cell voltage when 10.0 mL of 0.100 M EDTA has been added? (Hint: See Exercise 15-B.) i) Total mmoles of Mg*2 mmoles of EDTA added is mmoles of Mg*2 reacting with EDTA iv) mmoles of MgY2- v) Concentration of MgY2- in M vi) mmoles of excess unreacted Mg+2 vii) Concentration of Mg*2 in M viii) Concentration of EDTA (Y4-) in M ix) Total mmoles of Zn+2{1:NUMERICAL:%100%0.500:0.15} x) mole of Zny2- in M xi) Concentration of ZnY2- in M xii) Concentration of Zn2+ in M xiii) Potential of the cell in voltage, Ecell={1:NUMERICAL-1.364:0.1} 13 marks
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