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

question 60

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 × 10 ¹
• B)1 × 10 ¹
• C)1
• D)1 × 10 ⁻¹
• E)5 × 10 ⁻²

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