2. (a) Devise electrochemical cells in which the following reactions occur: (i) Zn(s) Cu2+(aq) Cu(s) + Zn2+(aq) (ii) Fe3+(aq) + Cr²+(aq) Fe2+(aq) + Cr3+(aq) (iii) Ag+(aq) + (aq) Agl(s) (b) For the electrochemical cell: Pt Fe³ (aq), Fe2(aq) || Br (aq) | Br2(g), (1 atm) | Pt, The standard electrode potential of the cathode is 1.065 V and the anode, 0.771 V at 298 K. Calculate: (6) (i) the standard e.m.f. of the cell and hence deduce the cell reaction, (6) (ii) the e.m.f. of the cell when a = 0.06, a = 0.01 and a = 0.03, (6) Br (iii) the equilibrium constant for the cell reaction at 298 K. (7)
2. (a) Devise electrochemical cells in which the following reactions occur: (i) Zn(s) Cu2+(aq) Cu(s) + Zn2+(aq) (ii) Fe3+(aq) + Cr²+(aq) Fe2+(aq) + Cr3+(aq) (iii) Ag+(aq) + (aq) Agl(s) (b) For the electrochemical cell: Pt Fe³ (aq), Fe2(aq) || Br (aq) | Br2(g), (1 atm) | Pt, The standard electrode potential of the cathode is 1.065 V and the anode, 0.771 V at 298 K. Calculate: (6) (i) the standard e.m.f. of the cell and hence deduce the cell reaction, (6) (ii) the e.m.f. of the cell when a = 0.06, a = 0.01 and a = 0.03, (6) Br (iii) the equilibrium constant for the cell reaction at 298 K. (7)
Physical Chemistry
2nd Edition
ISBN:9781133958437
Author:Ball, David W. (david Warren), BAER, Tomas
Publisher:Ball, David W. (david Warren), BAER, Tomas
Chapter8: Electrochemistry And Ionic Solutions
Section: Chapter Questions
Problem 8.10E: For each of the following reactions, determine the overall balanced electrochemical reaction, its...
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Question
Transcribed Image Text:2. (a) Devise electrochemical cells in which the following reactions occur:
(i) Zn(s) Cu2+(aq)
Cu(s) + Zn2+(aq)
(ii) Fe3+(aq) + Cr²+(aq)
Fe2+(aq) + Cr3+(aq)
(iii) Ag+(aq) + (aq)
Agl(s)
(b) For the electrochemical cell:
Pt Fe³ (aq), Fe2(aq) || Br (aq) | Br2(g), (1 atm) | Pt,
The standard electrode potential of the cathode is 1.065 V and the anode, 0.771 V
at 298 K. Calculate:
(6)
(i)
the standard e.m.f. of the cell and hence deduce the cell reaction,
(6)
(ii)
the e.m.f. of the cell when a = 0.06, a = 0.01 and a
= 0.03,
(6)
Br
(iii) the equilibrium constant for the cell reaction at 298 K.
(7)
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