To calculate the electrical conductivity of a 0.1 M KCl solution at 25C, we need to consider the molar conductivity of KCl and the concentration of the solution.The molar conductivity of KCl at 25C is approximately 149.9 S cm/mol. We can use the following equation to calculate the electrical conductivity:Electrical conductivity = Molar conductivity Concentration c = 149.9 S cm/mol 0.1 mol/L = 14.99 S/mSo, the electrical conductivity of a 0.1 M KCl solution at 25C is approximately 14.99 S/m or 14.99 S/cm.