O< >A apclassroom.collegeboard.orgCollegeBoardAP ClassroomI LOW BATTERYUnit 9 Progress Check: MCQ1m agYour Mac will sleep soon unless plugged into apower outlet.38.101112131415161718192122A UPDATES AVAILABLE231:07 AMDo you want to install the updates now?Cell TypeOperating Cell Potential for Commercial Batteries, E (V)Lithium-iodine+2.80Zinc-mercury+1.35Table 2Half-ReactionStandard Reduction Potential, E (V)Submit[Zn(OH),]?- + 2 e → Zn + 4 OH-1.20Zn(OH), + 2 e → Zn + 2 OHHgO + H2O + 2 e- Hg + 2OH-1.25+0.10O2 + 2 H,O + 4 e- → 4 OH+0.40Pacemakers are electronic devices that help regulate the heart rate. Currently, lithium-iodine cells are commonly used to power pacemakers and have replaced zinc-mercury cells. Table 1 provides the operatingcell potential, E, for each cell. Table 2 provides the standard reduction potentials for several half-reactions related to zinc-mercury and zinc-air cells.During the initial cell operation, each reaction is thermodynamically favorable, but the larger operating potential of the lithium-iodine cell indicates that its cell reaction is lessAthermodynamically favorable.Based on the information given, which of the following is a major difference between the zinc-mercury cell and the lithium-iodine cell?During the initial cell operation, each reaction is thermodynamically favorable, but the larger operating potential of the lithium-iodine cell indicates that its cell reaction is morethermodynamically favorable.During the initial cell operation, the oxidation of iodine is thermodynamically favorable but the oxidation of mercury is not.DDuring the initial cell operation, the oxidation of mercury is thermodynamically favorable but not the oxidation of iodine is not.

A question based on electrochemistry, which is to be accomplished.

Table 2 Half-Reaction Standard Reduction Potential, E (V) [Zn(OH),]- + 2 e Zn + 4 OH -1.20 Zn(OH), + 2 e Zn + 2 OH -1.25 HgO + H20 + 2e Hg + 2OH +0.10 O2 + 2 H20 + 4e 4 OH +0.40 Pacemakers are electronic devices that help regulate the heart rate. Currently, lithium-iodine cells are commonly used to power pacemakers and have replaced zinc-mercury cells. Table 1 provides the operating cell potential, E, for each cell. Table 2 provides the standard reduction potentials for several half-reactions related to zinc-mercury and zinc-air cells. Based on the information given, which of the following is a major difference between the zinc-mercury cell and the lithium-iodine cell? During the initial cell operation, each reaction is thermodynamically favorable, but the larger operating potential of the lithium-iodine cell indicates that its cell reaction is less thermodynamically favorable. A During the initial cell operation, each reaction is thermodynamically favorable, but the larger operating potential of the lithium-iodine cell indicates that its cell reaction is more thermodynamically favorable. C During the initial cell operation, the oxidation of iodine is thermodynamically favorable but the oxidation of mercury is not. D During the initial cell operation, the oxidation of mercury is thermodynamically favorable but not the oxidation of iodine is not.

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter25: Voltammetry

Section: Chapter Questions

Problem 25.17QAP