Some Models of Rechargeable Hearing Aids Use Lithium-Ion Batteries Composed

Some models of rechargeable hearing aids use lithium-ion batteries composed of a carbon (graphite) anode and a cobalt oxide-based cathode.  Reaction 1 shows the half-reaction that occurs at the anode during battery discharge, and Reaction 2 shows the balanced net reaction.LiC₆ → Li⁺ + e⁻ + C₆Reaction 1LiC₆ + CoO₂ → LiCoO₂ + C₆Reaction 2When the hearing aid is operating, what half-reaction occurs at the cathode?

A) CoO₂ + Li⁺ + e⁻ → LiCoO₂
B) LiCoO₂ → CoO₂ + Li⁺ + e⁻
C) CoO₂ + Li⁺ → LiCoO₂ + e⁻
D) LiCoO₂ + e⁻ → CoO₂ + Li⁺

Correct Answer:

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