Electrolytic Conduction

Important Terms:

1. Conductance: The reciprocal of resistance is known as conductance. It represent by G.

G = , unit = Ω-1

2. Specific Resistance: The resistance of a conductor of unit length and unit cross-section area is known as specific resistance. It is represented by ρ.

ρ =  = R
ρ = specific resistance
 

Unit: Ω cm.

3. Specific Conductance or Conductivity: The reciprocal of specific resistance is known as specific conductance. It is represented by κ.

 

Unit: Ω-1 cm-1 or Ω-1 m-1 S cm-1.

4. Cell Constant: For any cell, the ratio of distance between the electrode and area of electrode is constant which is known as cell constant. It is represented by σ .

σ = 

Unit: cm-1

Conductivity κ = 

κ = Gσ

5. Molar Conductance: It is defined as the conductance of all ions produced by ionisation of one molar solution of electrolyte. It is represented by Λ_M.

Λ_{M =} 
 

Unit: Ω-1 cm2 mol-1.

6. Equivalent Conductance: It is defined as the conductance of all ions produced by ionisation of one normal solution of electrolyte. It is represented by Λ_N.

Λ_N = 
 

Unit: Ω-1 cm2 equiv-1.