The ability of electrolyte to conduct electricity from its solution is called its “Conductivity”.
Conductivity depends upon following factors.
i. Velocity of ions:
Greater the velocity of ion, lesser will be the time required for movement of ion therefore the greater will be conductivity.
By increasing the temperature conductivity of electrolyte increase. It works on two ways.
By increasing the temperature the energy of molecules increases which result in the increment in velocity of ion therefore conductivity also increases.
By increasing the temperature the spaces between water molecules increases therefore the no of ions of electrolyte in the solution also increase to increase the conductivity.
iii. Degree of dilution:
Greater the concentration of solution lesser will be conductivity. By increasing the concentration, no of undissociated molecules increases therefore the motion of ions disturbed due to collision with undissociated molecules therefore the velocity of ion decreases means conductivity also decreases.
iv. Degree of ionization:
Conductivity is also depending upon degree of ionization. Greater the value of degree of ionization greater will be no of dissociated molecules and lesser will be undissociated molecules means conductivity increases.
α = no of dissociated molecules / Total molecules
Pressure has negligible effect of conductivity on the application of extremely high pressure the difference in conductivity is so small that it can be neglected.