## Conductivity of Electrolytic Solutions Chemistry Notes

**Conductivity of Electrolytic Solutions :**

Like metallic conductors there are also electrolytic conductors. When we form an aqueous solution of electrolyte or converts it in molten state then it conducts electricity and current is passed through it.

Molecular conductivity (Λ_{m}) = \(\frac{\kappa \times 1000}{C}\)

- K = specific conductivity
- Where Cis concentration of solution whose unit is mol L
^{-1}. - It is also called molar concentration, which is expressed by M.
- Molar conductivity (Λ
_{m}) = \(\frac{\kappa \times 1000}{M}\) - K = specific conductivity
- Its unit is ohm
^{-1}cm^{2}mol^{-1}or S m^{2}mol^{-1}or ohm^{-1}m^{2}mol^{-1}

→ Equivalent Conductivity-The conductivity of that volume of solution present between two electrodes placed apart from 1 cm of certain area in which one gram equivalent of electrolyte is dissolved, is called its equivalent conductivity. It is represented by Λ_{eq} (Lambda).

→ Equivalent conductivity (Λ_{eq})= \(\frac{\kappa \times 1000}{N}\)

where, K = specific conductivity

N = normality

The unit of equivalent conductivity is ohm^{-1} cm^{2} equivalent^{-1} or mho cm^{2} eq^{-1} or S cm^{2}eq^{-1}.

→ Note The electrolytes whose equivalent weight and molecular weight are not same, have following relation in their equivalent conductivity and molecular conductivity: