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Calculate the Equilibrium Constant for the Reaction Below at 25 \circ

Question 21

Multiple Choice

Calculate the equilibrium constant for the reaction below at 25 \circ C,
Co(s) + 2 Cr3+(aq) \to Co2+(aq) + 2 Cr2+(aq)
Given the following thermodynamic information.
Co2+(aq) + 2 e- \to Co(s)         ~~~~~~~~ E \circ = -0.28 V
Cr3+(aq) + e- \to Cr2+(aq)         ~~~~~~~~ E \circ = -0.41 V


A) 4.0 ×\times 10-5
B) 2.5 ×\times 104
C) 1.0 ×\times 105
D) 1.2 ×\times 105
E) 1.3 ×\times 105

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