Molar conductivity (^^_m) is defined as conducting power of the ions produced by 1 mole of an electrolyte in a solution. ^^_m =(K)/(C) where K is conductivity (in S-cm^(-1)), ^^_m is molar conductivity (in Scm^(2) mol^(-1)) and C is molar concontration (in "mole"//cm^(3)) The molar conductivity of 0.04 M solution of MgCl_2 is 200Scm^2 mol^(-1) at 298 K. A cell with electrodesthat are 2.0cm^(2) in surface area and 0.50 cm apart is filled with MgCl_2 solution. The cell constant is

Molar conductivity (^^_m) is defined as conducting power of the ions p

1.	Molar conductivity (^^_m) is defined as conducting power of the ions produced by 1 mole of an electrolyte in a solution. ^^_m =(K)/(C) where K is conductivity (in S-cm^(-1)), ^^_m is molar conductivity (in Scm^(2) mol^(-1)) and C is molar concontration (in "mole"//cm^(3)) The molar conductivity of 0.04 M solution of MgCl_2 is 200Scm^2 mol^(-1) at 298 K. A cell with electrodesthat are 2.0cm^(2) in surface area and 0.50 cm apart is filled with MgCl_2 solution. The cell constant is
Answer» `8 xx 10^(-3) S cm^(-1)` `32S cm^(-1)` `0.032 S cm^(-1) ` None of these SOLUTION :`^^_M = (K xx 1000)/(M) , K= M xx (^^_M)/(1000) = (0.04 xx 200)/(1000) = 8 xx 10^(-3)`