Cus) A voltaic cell is constructed using the following half-reactions: Cu*(ag) + e E°red = +0.521 V 2(6) + 2e 21 (aq) E°red = +0.536 V The cell is operated at 298 K with [Cu*] = 2.1 M and [I'] = 3.2 M. A. Determine ɛ for the cell at these concentrations. [Select ] B. Which electrode is the anode of the cell? [ Select ] C. Is the answer in B the same as it would be if the cell were operated under standard conditions? [ Select ] D. If [Cu*] = 1.4 M, at what molar concentration of I' would the cell have a zero potential? [ Select ]

Cus) A voltaic cell is constructed using the following half-reactions: Cu(ag) + e E°red = +0.521 V 2(6) + 2e 21 (aq) E°red = +0.536 V The cell is operated at 298 K with [Cu] = 2.1 M and [I'] = 3.2 M. A. Determine ɛ for the cell at these concentrations. [Select ] B. Which electrode is the anode of the cell? [ Select ] C. Is the answer in B the same as it would be if the cell were operated under standard conditions? [ Select ] D. If [Cu*] = 1.4 M, at what molar concentration of I' would the cell have a zero potential? [ Select ]

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter17: Electrochemistry

Section: Chapter Questions

Problem 105QAP: Consider a voltaic cell in which the following reaction occurs. Zn(s)+Sn2+(aq)Zn2+(aq)+Sn(s) (a)...

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Consider a voltaic cell in which the following reaction occurs. Zn(s)+Sn2+(aq)Zn2+(aq)+Sn(s) (a) Calculate E° for the cell. (b) When the cell operates, what happens to the concentration of Zn2+? The concentration of Sn2+? (c) When the cell voltage drops to zero, what is the ratio of the concentration of Zn2+ to that of Sn2+? (d) If the concentration of both cations is 1.0 M originally, what are the concentrations when the voltage drops to zero?
The saturated calomel electrode. abbreviated SCE. is often used as a reference electrode in making electrochemica1 measurements. The SCE is composed of mercury in contact with a saturated solution of calomel (Hg2Cl2). The electrolyte solution is saturated KCI. 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 17.1. a. Cu2++2eCu b. Fe3++e-Fe2+ c. AgCl+e-Ag+Cl- d. Al3++3eAl e. Ni2++2eNi
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