Question
The molar conductivity of KCl solutions at different concentration at 298 K are given below:
|
C/mol L–1 |
Λ/s cm2 mol–1 |
|
0.000198 0.000309 0.000521 0.000989 |
148.61 148.29 147.81 147.09 |
Solution
Taking the square root of concentration, we have
A plot of A(l /-axis) and c1/2 (x-axis) is shown in the fig. It is nearly a straight line. From the intercept (C1/2 = 0) we find that Λ° = 149.8 s cm2 mol–1 and Slope = A = 87.46s cm2 mol–1/(mol / L–1)1/2.
|
C1/2 /(mol L–1)1/2 |
A/s cm2 mol–1 |
|
0.01407 0.01758 0.02283 0.03145 |
148.61 148.29 147.81 147.09 |
A plot of A(l /-axis) and c1/2 (x-axis) is shown in the fig. It is nearly a straight line. From the intercept (C1/2 = 0) we find that Λ° = 149.8 s cm2 mol–1 and Slope = A = 87.46s cm2 mol–1/(mol / L–1)1/2.
