Question

The specific conductance of a 0.20 mol L-1 solution of an electrolyte at 20°C is
2.48 x 10-4 ohm-1 cm-1. The molar conductivity of the solution is​

Answer 1

Answer:

comment if the answer is wrong

Explanation:

The specific conductance of a 0.01M solution of acetic acid at 298K is 1.65×10−4 ohm−1 cm−1. The molar conductance at infinite dilution for H+ ion and CH3COO− ion are 349.1ohm−1 cm2mol−1 and 40.9ohm−1 cm2mol−1  respectively.

Calculate:

(i)  Molar conductance of the solution.

(ii)  Degree of dissociation of CH3COOH.

(iii)  Dissociation constant for acetic acid.

ANSWER

(i)  Molar conductance Λm=CK×1000=0.011.65×10−4×1000=16.5 ohm−1cm2mol−1

(ii)  Degree of dissociation α=Λm∞Λm

Λm=16.5ohm−1