Redox Reactions And Electrochemistry Ques 344
Question: The standard emf of a cell having one electron change found to be 0.591 V at $ 25{}^\circ C $ . The equilibrium constant the reaction is
Options:
A) $ 1.0\times 10^{30} $
B) $ 1.0\times 10^{5} $
C) $ 1.0\times 10^{10} $
D) $ 1.0\times 10^{1} $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] $ E_{cell}=E^o_{cell}-\frac{0.059}{n}\log Q $ At equilibrium, $ E_{cell}=0 $ and $ Q=K_{c} $ $ E^o_{cell}=\frac{0.059}{1}\log K_{c} $
$ \Rightarrow 0.591=\frac{0.059}{1}\log K_{c} $
$ \therefore K_{c}=1\times 10^{10} $
