Question

Standard EMF of a galvanic cell involving 2e transfer is found to be 0.591 V at 25degreecelsius. Calculate equillibrium constant for cell reaction

Answer 1

delta G = -RT Lnk
delta G = - nEF

n = 2
E =0.591
F = 96500

nEF =RT LnK

2× 0.591 ×96500/ 8.3 × 298

= lnk

lnk = 46

k = e^46

Answer 2

Answer:10^20

Explanation: firstly we solve the equation for E and we will get the product 20=logKc

Where Kc being the eq constant.

Now we know that for log value to be 20 the log e has to be 20 times multiple of 10 ie log10^20 hence the answer.