Answered: Useful Information Half reaction E (v)…

Useful Information Half reaction E (v) ½Cl2 + e-→ Cl- +1.36 v 0.82 (pH 7.00) 0.80 0.77 0.34 -0.036 -0.41 (pH 700) 0.44 0.76 Ag+ + e-→ Ag(s) Fe te- Fe Cut +2e Cu(s) Fet +3e Fe(s) Zn2 +2e Zn(s)

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter9: Complexometric And Precipitation Titrations

Section: Chapter Questions

Problem 9P

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Question

Two Pt electrodes are placed in an aqueous solution of ZnSO4 at pH 7 and a potential of 2.00v is applied to the electrodes. In the sulfate ion, sulfur is in its highest oxidation state.

a) What are the possible reduction reactions that can take place in this system?

(2H+) + (2e-)--> H2 E= -0.41v at pH 7

(Zn^2+) + (2e-)--> Zn E*= -0.76v

Can you explain why this is the solution?

Useful
Information
Half reaction
E (v)
½Cl2 + e-→ Cl-
+1.36 v
0.82 (pH 7.00)
0.80
0.77
0.34
-0.036
-0.41 (pH 700)
0.44
0.76
Ag+ + e-→ Ag(s)
Fe te- Fe
Cut +2e Cu(s)
Fet +3e Fe(s)
Zn2 +2e Zn(s)

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