What Is the Concentration of Al³⁺(aq)in the Following Cell at 25

question 17

Multiple Choice

What is the concentration of Al³⁺(aq) in the following cell at 25 °C if the cell voltage is 1.486 V?
Al(s) ∣ Al³⁺(aq,?) Sn²⁺(aq,3.21 × 10^-4 M) ∣ Sn(s)
Al³⁺(aq) + 3 e^- → Al(s) E° = -1.676 V
Sn²⁺(aq) + 2 e^- → Sn(s) E° = -0.137 V

• A)2.8 × 10^-3 M
• B)1.6 × 10^-5 M
• C)4.5 × 10^-5 M
• D)2.4 × 10^-2 M
• E)7.8 × 10^-6 M

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