The saturated calomel electrode, abbreviated SCE, is often used as a reference electrode in making electrochemical measurements. The SCE is composed of mercury in contact with a saturated solution of calomel (Hg₂Cl₂). The electrolyte solution is saturated KCI. SCE is +0.242 V relative to the standard hydrogen electrode. Calculate the potential for each of the following galvanic cells containing a saturated calomel electrode and the given half-cell components at standard conditions. In each case, indicate whether the SCE is the cathode or the anode. Standard reduction potentials are found in the Standard Reduction Potentials table. (a) AgCl + e → Ag + CI 80 V SCE role: O cathode anode (b) Zn2+ + 2e → Zn 80 SCE role: 80 O cathode anode (c) Fe³+ + e → Fe²+ SCE role: O cathode O anode V V

The saturated calomel electrode, abbreviated SCE, is often used as a reference electrode in making electrochemical measurements. The SCE is composed of mercury in contact with a saturated solution of calomel (Hg₂Cl₂). The electrolyte solution is saturated KCI. SCE is +0.242 V relative to the standard hydrogen electrode. Calculate the potential for each of the following galvanic cells containing a saturated calomel electrode and the given half-cell components at standard conditions. In each case, indicate whether the SCE is the cathode or the anode. Standard reduction potentials are found in the Standard Reduction Potentials table. (a) AgCl + e → Ag + CI 80 V SCE role: O cathode anode (b) Zn2+ + 2e → Zn 80 SCE role: 80 O cathode anode (c) Fe³+ + e → Fe²+ SCE role: O cathode O anode V V

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 83AP

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