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The resistance of 0.01 M NaCl solution at 25 °C is 200 Ω. The cell constant of conductivity cell is unity. Calculate the molar conductance.
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- The molar conductivity of a 1.5 M solution of an electrolyte is found to be 138.9 S cm2mol-1. Calculate the conductivity of the solution.The mobility of an ethanoate (acetate) ion in aqueous solution at 25 °C is 4.24 × 10−8 m2 s−1 V−1. Calculate the molar ionic conductivity.(a) State Kohlrausch’s law of independent migration of ions. Mention one application of Kohlrausch’s law.(b) The resistance of a conductivity cell containing 10-3 M KC1 solution at 25 °C is1500 Q. What is the cell constant if conductivity of 10-3 M KC1 solution at 25 °C is 1.5 X 10-4 S cm-1?
- The conductivity of 0.20 M solution of KCl at 298 K is 0.025 S cm-1. Calculate its molar conductivity.In a certain conductivity cell, the resistance of a 0.01 M KCl solution is 150 W. The known molar conductivity of the solution is 141.27 W-1 cm2 mol-1. Calculate the cell constant (Kcell). *(Kcell unit is cm-1)The conductivity of 0.001 M acetic acid is 4 × 10-5 S/cm. Calculate the dissociation constant of acetic acid, if molar conductivity at infinite dilution for acetic acid is 390 S cm2/mol.
- At 298 K, the electrolytic conductivity of a 0.2 M KC1 solution is 2.50 X 10-2S cm-1. Calculate its molar conductivity.The mobility of a Li+ ion in aqueous solution is 4.01 × 10−8 m2 s−1 V−1 at 25 °C. The potential difference between two electrodes separated by 5.00 mm and placed in the solution, is 24.0 V. What is the drift speed of the ion?The mobility of a Rb+ ion in aqueous solution is 7.92 × 10−8 m2 s−1 V−1 at 25 °C. The potential difference between two electrodes, separated by 7.00 mm and placed in the solution, is 25.0 V. What is the drift speed of the Rb+ ion?
- For weak electrolytes, how can molar conductance be used to determine the degree of dissociation?A conductivity cell has a resistance of 250 Ω when filled with 0.02 M KCl at 25°C and 105 Ω when filled with 6 x 10-5 M ammonium hydroxide solution. The conductivity of 0.02 M KCl solution at 25°C is 0.277 Sm-1, and the limiting molar ionic conductivities of NH4 + and OH- are 7.34 x 10-3 and 0.0198 S m2mol-1 , respectively. Calculate the cell constant and degree of dissociation of ammonium hydroxide in the 6 x 10-5 M solution.The mobility of a chloride ion in aqueous solution at 25 °C is 7.91 × 10−8 m2 s−1 V−1. Calculate the molar ionic conductivity.