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How is molar conductivity of an aqueous electrolyte solution measured experimentally |
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Answer» Solution :Molar conductivity: The conductivity of a colume of solutin containgin on egram molecular weight of the ELECTROLYTE placed between two parallel electrodes separated by a DISTANCE ofunit length of 1 meter is called molar conductivity `(^^_(m))` Relation between conductivity and molar conductivity : `^^_(m)=k/c,therefore c=` constant `to ` The conductance of a solutin measured in a conductivity cell. `to ` By using the conductivity cells Resistance `(R )=(l)/(kxxA)` l = distance between electrodes, A = Area of cross section, k= conductivity `G ^(**)=l/A=` cell constant `to` Cell constant is measured by measuring the resistance of the cell containing a solution WHOSE conductivity is known. `to` Cell constant determined is used for measuring the resistance (or) conductivity. `therefore` molar conductivity `^^_((m))=x/c` `^^_((m))=(k(Scm^(-1)))/(100(Lm^(-3)"molarity(mole/lit)"))` |
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