A redox reaction employed in an electrochemical cell has a negative. Which statement is true? a) E∘cell is positive b) K>1 E∘cell is positive c) K<1 E∘cell is negative d) K1

Question

Chemistry

Trace Walter

2 August, 16:25

A redox reaction employed in an electrochemical cell has a negative. Which statement is true? a) E∘cell is positive b) K>1 E∘cell is positive c) K<1 E∘cell is negative d) K1

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d. K<1 E∘cell is negative

Explanation:

Since E⁰ = negative, ΔG = - nFE⁰ = - nF - ve = + ve.

Also, ΔG = - RTlnK

K = exp (-RTΔG)

Since ΔG = + ve, - RTΔG = - ve

K = 1/exp (RTΔG) < 1.

So our answer is E⁰ cell is negative and K < 1