VARIATION IN MOLAR CANDUCTIVITY:

 

-The molar conductivity of a solution increases with decrease in cancentration of the electrolyte.It       can be explained as follows-

-On dilluting the solution, the total volume of 'V' of the solution canting 1 mol of the electrolyte.

-Molar conductivity is the conductivity of a solution enclosed between two electrodes a unit distance a part and having area of cross-section equal to the volume 'V' of the solution cantining 1 mole of the electrolyte.

-The decrease in conductivity vappa of the solution is more than compansiated by increase in it's volume.Hence,molar conductivity of a solution increase on dillution.

                       Limiting Molar Conductivity: 

                            When the concentration of the electrolyte in the solution approaches.Zero The molar conductivity is known as.......

                            Weak Electrolyte:  

                -The molar conductivity of a weak electrolyte increase steeply on dilution specially near                   very law concentration.It is because at inifinety dillution i.e,when c-o,the weak                                 electrolyte dissociate completely.  

For Strong Electrolyte:The molar conductivity increase very slightly with dillution.It is b'coz the strong electrolytes are almost completely ionised in concentrated solution and on dillution,the no.of ions do not increase.

KOHLRAUSCH LAW:

                                      " At infinite dillution when the dissociation of each and every type of electrolyte is complete,each ion gives it on contribution towards the value of molar conductivity irrespective of the fact that will which ion it is associated previonsly.