A Voltaic Cell Is Based on a Co²⁺/Co Half-Cell and an Ag¹⁺/Ag

question 85

Multiple Choice

A voltaic cell is based on a Co²⁺/Co half-cell and an Ag¹⁺/Ag half-cell. Given E ° _red(Co²⁺/Co) = - 0.277 V and E ° _red(Ag¹⁺/Ag) = +0.222 V, which statement below is true regarding which half cell operates at the positive electrode and what is the standard cell potential E ° _cell for this voltaic cell?

• A) The Co²⁺/Co half-cell operates at the positive electrode and the standard cell potential E ° _cell is 0.499 V.
• B) The Co²⁺/Co half-cell operates at the positive electrode and the standard cell potential E ° _cell is - 0.055 V.
• C) The Co²⁺/Co half-cell operates at the positive electrode and the standard cell potential E ° _cell is 0.055 V.
• D) The Ag¹⁺/Ag half-cell operates at the positive electrode and the standard cell potential E ° _cell is 0.499 V.
• E) The Ag¹⁺/Ag half-cell operates at the positive electrode and the standard cell potential E ° _cell is 0.055 V.

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