A Voltaic Cell Consists of a Cd/Cd²⁺ Electrode (E° =

question 104

Multiple Choice

A voltaic cell consists of a Cd/Cd²⁺ electrode (E° = -0.40 V) and a Fe/Fe²⁺ electrode (E° = -0.44 V) . If E_cell = 0 and the temperature is 25°C, what is the ratio [Fe²⁺]/[Cd²⁺]?

• A) 2.3 × 10¹
• B) 1.0 × 10¹
• C) 1.0
• D) 1.0 × 10^-1
• E) 5.0 × 10^-2

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