AIIMS2018ChemistryElectrochemistry
0.1 M solution is present in a conductivity cell with electrode of 100 ~cm ^2 area placed 1 ~cm apart and resistance observed is 5 10^3 ohm . What is the molar conductivity of this solution?
Options
- A5 10^2 ~S ~cm ^2 ~mol ⁻¹
- B10^4 ~S ~cm ~mol ⁻¹
- C200 ~S ~cm ^2 ~mol ⁻¹
- D0.02 ~S ~cm ^2 ~mol ⁻¹
Correct answer
D. 0.02 ~S ~cm ^2 ~mol ⁻¹
Step-by-step solution
Molar conductivity, _m= 1000 M M= molarity and = specific conductivity aligned & = 1 R cell constant & = 1 R A = 1 5 10^3 1 ~cm 100 ~cm ^2 & =2 10⁻⁶ ⁻¹ ~cm ⁻¹ _m & = 2 10⁻⁶ 1000 0.1 =0.02 ~S ~cm ^2 ~mol ⁻¹ aligned