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)

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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