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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