A Voltaic Cell Consists of a Mn/Mn²⁺ Electrode (E° =

question 29

Multiple Choice

A voltaic cell consists of a Mn/Mn²⁺ electrode (E° = -1.18 V) and a Fe/Fe²⁺ electrode (E° = -0.44 V) . Calculate [Fe²⁺] if [Mn²⁺] = 0.050 M and E_cell = 0.78 V at 25°C.

• A) 0.040 M
• B) 0.24 M
• C) 1.1 M
• D) 1.8 M
• E) none of the above

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