Pacemakers Implanted in the Chests of Patients with Certain Heart

question 8

Multiple Choice

Pacemakers implanted in the chests of patients with certain heart conditions are powered by a lithium/iodine PVP battery, where PVP represents polyvinylpyridine. The cell reaction and standard cell potential are given below. The standard reduction potential for Li/Li is 3.05 V. What species is oxidized in this reaction? 3.59 V

• A)Li
• B)I₂
• C)I₂:PVP
• D)PVP
• E)LiI

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