Strong electrolytes
o
When the concentration approaches to zero, the molar conductivity is referred to as limiting molar conductivity. It is represented by the symbol Ë o m.
Strong electrolytes
o
A solute or substances that completely ionize or dissociates in a solution are known as strong electrolyte. These ions are good conductors of electricity in the solution.
o For example, HCl, HBr, HI, HNO3, NaOH, KOH, etc. o
For strong electrolytes, Λm increases slowly with dilution and can berepresented by the equation:
o It dissociates completely at moderate concentrations.
o The conductance of the solution increases with dilution of solution. o
There exist strong interionic forces of attraction at moderate concentrations.
o The slope for Λm vs c 1 / 2 is linear at low concentrations.
Fig. Molar conductivity Λm Vs. c 1 / 2 for acetic acid and potassium chloride