Question

State Kohlrausch law of  independent migration of ions. Derive  the relationship between Gibbs energy  of cell reaction and cell potential​

Answer 1

Answer:

it states that the equivalent conductive of an electrolyte in a infinite dilution us equal to the sum of the conductance of anion and cation

rln btw Gibbs energy of cell reaction and cell potential

∆G°= -nfE°cell

Answer 2

Answer:

A] Kohlrausch law states that “at infinite dilution each ion migrates independent of co-ion and contributes to total molar conductivity of an electrolyte irrespective of the nature of other ion to which it is associated.”

B]  

1.The electrical work done in a galvanic cell is the electricity (charge) passed multiplied by the cell potential.

Electrical work = amount of charge × cell potential

2. Charge of one mole electrons is F coulombs.

For the cell reaction involving n moles of electrons,

Charge passed = nF coulombs

3. Hence, electrical work = nFEcell

Electrical work done in a galvanic cell is equal to the decrease in Gibbs energy, – ∆G, of cell reaction. .

It then follows that

Electrical work done = − ∆G

4. Therefore, −∆G = nFEcell   or ∆G = − nFEcell

Under standard state conditions, we write

∆G° = − nFE0cell