Conductivity of Electrolytic Solutions Chemistry Notes

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 (Λm) = \(\frac{\kappa \times 1000}{C}\)

  • 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 (Λm) = \(\frac{\kappa \times 1000}{M}\)
  • K = specific conductivity
  • Its unit is ohm-1cm2 mol-1 or S m2 mol-1 or ohm-1m2mol-1

Conductivity of Electrolytic Solutions Chemistry Notes

→ 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 Λeq (Lambda).

→ Equivalent conductivity (Λeq)= \(\frac{\kappa \times 1000}{N}\)
where, K = specific conductivity
N = normality
The unit of equivalent conductivity is ohm-1 cm2 equivalent-1 or mho cm2 eq-1 or S cm2eq-1.

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

Conductivity of Electrolytic Solutions Chemistry Notes 1

Chemistry Notes

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