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what is the difference between molar conductivity and molar conductance?

what is the difference between molar conductivity and molar conductance?


2 Answers

harihara kumar
45 Points
9 years ago

dear sreya,

Molar conductivity is defined as the conductivity of an electrolyte solution divided by the molar concentration of the electrolyte, and so measures the efficiency with which a given electrolyte conducts electricity in solution. Its units are siemens per meter per molarity, or siemens meter-squared per mole. The usual symbol is a capital lambda, Λ, or Λm.


 The molar conductance is defined as the conductance of all the ions produced by ionization of 1 g mole of an electrolyte when present in V mL of solution. It is denoted by .

           Molar conductance     μ = k ×V                                 .... (vii)

where V is the volume in mL containing 1 g mole of the electrolyte. If c is the concentration of the solution in g mole per litre, then

                        μ  = k ×  1000/c

                It units are ohm-1 cm2 mol-1.

                Equivalent conductance =  (MOlar conductance)/n

                where                      n =  (Molecular mass)/(Equivalent mass)


15 Points
3 years ago
the conductivity will be raised by increasing the concentration but in the high concentration because of the Coulomb interaction and formation of the ion pairs the conductivity will be decreased. Meanwhile, the molar conductivity will be decreased by increasing the concentration and in the higher concentration, the graph will experience the constant molar conductivity.

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