Q. For Acell reaction involving Atwo-electron change, the standard emf of the cell is found to be 0.295 V at 25℃. The equilibrium constant of the reaction at 25 ℃ will be
A) $1\ \times \ 10^{- 10}$
B) $29.5\ \times \ 10^{- 2}$
C) $10$
D) $1\ \times \ 10^{10}$
Explanation
(d)
$E_{cell}^{{^\circ}}$= $\frac{2.303RT}{nF}\log K_{eq}$
0.295 = $\frac{0.0591}{2}\log K_{eq}$
∴ $\log K_{eq}$ = 10
∴ $K_{eq} = 10^{10}$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.