KCET2011ChemistryElectrochemistry
The standard emf of a galvanic cell involving 2 moles of electrons in its redox reaction is 0.59 ~V . The equilibrium constant for the redox reaction of the cell is
Options
- A10²⁰
- B10⁵
- C10
- D10¹⁰
Correct answer
A. 10²⁰
Step-by-step solution
In a galvanic cell, G^ =-n F E^ Relationship between G^ and equilibrium constant G^ =-2.303 R T K_ p From Eqs. (i) and (ii), we get gathered -2.303 R T K_ p =-n F E^ K_ p = n F E^ 2.303 R T = n E^ 2.303 R T F = 2 0.59 0.059 =20 K_ p = AL (20) ( AL = Antilog ) K_ p =10²⁰ gathered