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
Show that a plot between A and C1/2 is a straight line. Determine the values of Λ° and Λ for KCl. - Zigya
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
Show that a plot between A and C1/2 is a straight line. Determine the values of Λ° and Λ for KCl.
Taking the square root of concentration, we have
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.
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