The saturated calomel electrode, abbreviated SCE, is often

Chapter 18, Problem 115

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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 KCl. eSCE 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 Table 18.1. a. d. b. e. c. AgCl e Ag Cl Ni2 2e Fe Ni 3 e Fe2 Al3 3e Cu Al 2 2e Cu 2C