Given the Table Below Predict the Numerical Value of the Standard

question 116

Multiple Choice

Given the table below predict the numerical value of the standard cell potential for the reaction:
2 Cr(s) + 3 Cu²⁺(aq) → 2 Cr³⁺(aq) + 3 Cu(s)
Half Reaction E° (volts)
(1) Cr³⁺(aq) + 3 e^- → Cr(s) -0.74
(2) Cr³⁺(aq) + e^- → Cr²⁺(aq) -0.41
(3) Cr₂O₇^2-(aq) + 14 H⁺(aq) + 6 e^- → 2 Cr³⁺(aq) + 7 H₂O(l) 1.33
(4) Cu⁺(aq) + e^- → Cu(s) 0.52
(5) Cu²⁺(aq) + 2 e^- → Cu(s) 0.34
(6) Cu²⁺(aq) + e^- → Cu⁺(aq) 0.16

• A)2.50 volts
• B)0.417 volts
• C)-1.08 volts
• D)1.08 volts
• E)-0.40 volts

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